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This page is linked from the [[Getting Started]] Section.
The options listed on this page influence the way how database [[Commands|commands]] are executed and XQuery expressions are evaluated. Three data types Two kinds of options exist: strings, numbers, and booleans.
* Values can be changed with the '''[[Commands#SETGlobal Options|SETGlobal Options]] command and requested ''' are valid for all BaseX instances in the same JVM. This is particularly relevant if you are working with the [[Commands#GET|GET]] commandclient/server architecture. All values are * '''Local options'statically bound'' (all remaining ones) are specific to a database client or session; they stay valid until they are changed once again by another operation. If an option is of type boolean, and if no value is specified, its existing value will be inverted.
* Values of options are either ''strings'', ''numbers'' or ''booleans''. Options can also be set in are ''static'' and not bound to a single operation (for example, the prolog of XQuery expressionsnext command). In the option declaration, keys need Various ways exist to be prefixed with {{Code|db:}}. All values will be reset after the evaluation of a queryaccess and change options:
* The current value of an option can be requested with the {{Command|GET}} command. Local options can be changed via {{Command|SET}} (all global options, except for {{Option|DEBUG}}, can only be changed at startup time). If an option is of type ''boolean'', and if no value is specified, its current value will be inverted. * The {{Code|.basex}} [[Configuration#Configuration Files|configuration file]] is parsed by every new local BaseX instance. It contains all global options. Local options can be specified at the end of the file after the {{Code|Local Options}} comment: <pre classsyntaxhighlight lang="brush:xqueryperl">declare option db:key 'value';# General OptionsDEBUG = false
...
</pre>
# Local OptionsCHOP = false</syntaxhighlight> * Initial values for global options can also be specified via system properties, which can e.g. be passed on with the [https://docs.oracle.com/en/java/javase/11/tools/java.html -D flag] on command line, or using [https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/System.html#setProperty(java.lang.String,java.lang.String) System.setProperty()] before creating a BaseX instance. The specified keys need to be prefixed with {{VersionCode|7org.basex.4}}. An example: <syntaxhighlight lang="perl">java -Dorg.basex.CHOP=false -cp basex.jar org.basex.BaseX -c"get chop"CHOP: Options false</syntaxhighlight> * If using the Mac OS X packaged application then global options can be locally set in XQuery via pragma expressionswithin the Info.plist file within the Contents folder of the application package. For example: <syntaxhighlight lang="xml"><key>JVMOptions</key><array> <string>-Dorg.basex. Note that, at least for now, local pragmas will have no effect on most CHOP=false</string></array></syntaxhighlight> * In a [[Update|update operationsWeb Application]], as these will the default can be evaluated at adjusted in the very end of a query{{Code|web. The following query preserves whitespaces from the parsed XML stringxml}} file as follows:
<pre classsyntaxhighlight lang="brush:xqueryxml">(# db:<context-param> <param-name>org.basex.chop </param-name> <param-value>false #) { parse</param-xml('<xmlvalue> hi </xmlcontext-param>') }</presyntaxhighlight>
* If In XQuery, local options are implicitly changed by operations in the [[GUI]], the underlying commands will can be listed in the set via option declarations and [[GUIXQuery Extensions#VisualizationsPragmas|Info Viewpragmas]].<br/>&nbsp;
=Main Options=If options are changed by operations in the [[GUI]], the underlying commands will be listed in the [[GUI#Visualizations|Info View]].<br/><br/>
The main =Global Options= Global options are constants. They can only available from be set in the configuration file or via system properties (see above). One exception is the [[Standalone Mode#debug|DEBUG]] and option, which can also be changed at runtime by users with [[Database ServerUser Management|admin permissions]] instances of BaseX, i.e ==General Options== ===DEBUG=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|DEBUG [boolean]}}|-| '''Default'''|{{Code|false}}|-| '''Summary'''|Sends internal debug info to STDERR., they cannot This option can be changed by database clientsturned on to get additional information for development and debugging purposes. They are stored in the It can also be triggered on [[ConfigurationCommand-Line Options#Configuration FilesBaseX Standalone|.basex config filecommand line]], which is opened by every new BaseX instance:via <code>-d</code>.|}
===DBPATH===
 {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|DBPATH [path]}}
|-
| '''Default'''
|<code>[[Configuration#Database Directory|{home}/BaseXData]]</code> or <code>[[Configuration#Database Directory|{home}/data]]</code>
|-
| '''Summary'''
|Points to the directory in which all databases are located.<br/> '''Note:''' this option can only be changed if no database is currently opened. If the option is changed, existing databases will not be moved to the new location.
|}
===REPOPATHLOGPATH=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|REPOPATH LOGPATH [path]}}
|-
| '''Default'''
|<code>[[Configuration#Database Directory|{home}/BaseXRepo]].logs</code>
|-
| '''Summary'''
|Points to the directory in which all [[RepositoryLogging|log files]], in which all XQuery modules are locatedstored.<br/>'''Note:''' if Relative paths will be resolved against the option is changed, BaseX needs to be restarted in order to activate existing packages and avoid side effects{{Option|DBPATH}} directory.
|}
===DEBUGREPOPATH=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|DEBUGREPOPATH [path]}}
|-
| '''Default'''
|<code>[[Configuration#Database Directory|{{Code|false}home}/repo]]</code>
|-
| '''Summary'''
|Sends internal debug info Points to STDERR. This option can be turned on to get additional information for development and debugging purposesthe [[Repository]], in which all XQuery modules are located.
|}
===LANG===
 {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|LANG [language]}}
|-
|-
| '''Summary'''
|Specifies the interface language. Currently, seven languages are available: 'English', 'German', 'French', 'Dutch', 'Italian', 'Japanese', and 'Vietnamese'. BaseX needs to be restarted in order to activate the new language.
|}
===LANGKEY===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|LANGKEY[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Prefixes all texts with the internal language keys. This option is helpful if BaseX is translated into another language, and if you want to see where particular texts are displayed. BaseX needs |} ===FAIRLOCK=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|FAIRLOCK [boolean]}}|-| '''Default'''|{{Code|false}}|-| '''Summary'''|Defines the locking strategy:* By default, non-fair is used. Read transactions will be favored, and transactions that access no databases can be evaluated even if the limit of parallel transactions (specified via {{Option|PARALLEL}}) has been reached. This prevents update operations from blocking all other requests. For example, the DBA can further be used to see which jobs are running, even if the queue is full.* If fair locking is enabled, read and write transactions will be restarted treated equally (first in order to activate this option, first out). This avoids starvation of update operations, and it should be used if the prompt evaluation of update operations is critical.|} ===CACHETIMEOUT=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|CACHETIMEOUT [seconds]}}|-| '''Default'''|{{Code|3600}}|-| '''Summary'''|Specifies how many seconds the results of queries, which have been queued by the [[Jobs Module|asynchronously executed]], will be cached in main memory.
|}
===HOST===
 {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|HOST [host]}}
|-
|-
| '''Summary'''
|This host name is used by the client when connecting to a server. This option can also be changed when running the client on [[Command-Line Options#BaseX Client|command line]] via <code>-n</code>.
|}
===PORT===
 {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|PORT [port]}}
|-
|-
| '''Summary'''
|This port is used by the client when connecting to a server. This option can also be changed when running the client on [[Command-Line Options#BaseX Client|command line]] via <code>-p</code>.
|}
===SERVERPORT===
 {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|SERVERPORT [port]}}
|-
|-
| '''Summary'''
|This is the port the database server will be listening to. This option can also be changed when running the server on [[Command-Line Options#BaseX Server|command line]] via <code>-p</code>.
|}
===SERVERHOSTUSER=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|SERVERHOST USER [host&#x7c;ipname]}}
|-
| '''Default'''
|''empty'' (''wildcard'')
|-
| '''Summary'''
|This Represents a user name, which is used for accessing the host name server or ip address an HTTP service:* The default value will be overwritten if a client specifies its own credentials.* If the server default value is bound to. The server empty, login will only be open to all clients possible if the client specifies credentials.* The option is set to an empty stringcan also be changed on [[Command-Line Options#BaseX Client|command line]] via <code>-U</code>.
|}
===EVENTPORTPASSWORD=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|EVENTPORT PASSWORD [portpassword]}}
|-
| '''Default'''
|{{Code|1985}}''empty''
|-
| '''Summary'''
|This port Represents a password, which is used by for accessing the server:* The default value will be overwritten if a client specifies its own credentials.* If the default value is empty, login will only be possible if the client to listen for specifies credentials.* The option can also be changed on [[EventsCommand-Line Options#BaseX Client|server eventscommand line]]via <code>-P</code>. This port will only be bound if * Please note that it is a client attaches itself security risk to a database eventspecify your password in plain text.
|}
===HTTPPORTAUTHMETHOD=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|HTTPPORT AUTHMETHOD [portmethod]}}
|-
| '''Default'''
|{{Code|8984}}''Basic''
|-
| '''Summary'''
|This is Specifies the port default authentication method, which will be used by the [[Startup#BaseX HTTP ServerWeb Application|HTTP Serverserver]] for negotiating credentials. Allowed values are {{Code|Basic}}, {{Code|Digest}}, and {{Code|Custom}}:<br/>* If basic access is chosen, the client can still request digest authentication.* This is different for digest access, which cannot be overwritten.* With custom authentication, the server will be listening tonot do any authentication.
|}
===STOPPORTSERVERHOST=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|STOPPORT SERVERHOST [porthost&#x7c;ip]}}
|-
| '''Default'''
|{{Code|8985}}''empty''
|-
| '''Summary'''
|This is the port on host name or ip address the server is bound to. If the option is set to an empty string (which is the default), the [[Startup#BaseX HTTP Server|HTTP Server]] can server will be locally closedopen to all clients.
|}
===HTTPPATHPROXYHOST=== {|width='100%' width='100%'
|-
| width='90120' | '''Signature'''|{{Code|HTTPPATH PROXYHOST [pathhost]}}
|-
| '''Default'''
|<code>[[Configuration#Database Directory|{home}/BaseXHTTP]]</code>''empty''
|-
| '''Summary'''
|Points to This is the HTTP root directory, in which HTML files may be storedhost name of a proxy server. If the value is an empty string, and query files that it will be evaluated by the [[REST]] serviceignored.
|}
===PROXYHOSTPROXYPORT=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|PROXYHOST PROXYPORT [hostport]}}
|-
| '''Default'''
|{{Code|0}}
|-
| '''Summary'''
|This is the host name port number of a proxy server. If the value is set to {{Code|0}}, it will be ignored.
|}
===PROXYPORTNONPROXYHOSTS=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|PROXYPORT NONPROXYHOSTS [porthosts]}}
|-
| '''Default'''
|{{Code|80}}''empty''
|-
| '''Summary'''
|This is a list of hosts that should be directly accessed. If the port number of a proxy servervalue is an empty string, it will be ignored.
|}
===NONPROXYHOSTSIGNOREHOSTNAME=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|NONPROXYHOSTS IGNOREHOSTNAME [hostsboolean]}}
|-
| '''Default'''
|{{Code|false}}
|-
| '''Summary'''
|This If this option is a list enabled, hostnames of hosts that should certificates will not be directly accessedverified. Use {{Option|IGNORECERT}} to completely disable certificate verification.
|}
===PARALLELIGNORECERT=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|PARALLEL IGNORECERT [numberboolean]}}
|-
| '''Default'''
|{{Code|8false}}
|-
| '''Summary'''
|Denotes the maximum allowed This option can be turned on to ignore untrusted certificates when connecting to servers. Use {{CodeOption|numberIGNOREHOSTNAME}} of parallel read [[Transaction Management|transactions]]to suppress only the hostname verification.
|}
===TIMEOUT===
{{Mark|Updated with Version 7.3:}} default value set from {{Code|0}} to {{Code|30}}. {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|TIMEOUT [seconds]}}
|-
|-
| '''Summary'''
|Specifies the maximum time a read-only transaction triggered by a client may take. If an operation takes longer than the specified timeoutnumber of seconds, it will be aborted.<br/>Write Active update operations will not be affected by this timeout, as this would corrupt the integrity of the database.<br/>The timeout is deactivated if the timeout is set to {{Code|0}}. It is ignored for {{Codeoperations with [[User Management|ADMIN}} operationsadmin permissions]].
|}
===KEEPALIVE===
{{Mark|Updated with Version 7.3:}} default value set from {{Code|0}} to {{Code|600}}. {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|KEEPALIVE [seconds]}}
|-
| '''Summary'''
|Specifies the maximum time a client will be remembered by the server. If there has been no interaction with a client for a longer time than specified by this timeout, it will be disconnected. Running operations will not be affected by this option. The keepalive check is deactivated if the value is set to {{Code|0}}.
|}
 
===PARALLEL===
 
{| width='100%'
|-
| width='120' | '''Signature'''
|{{Code|PARALLEL [number]}}
|-
| '''Default'''
|{{Code|8}}
|-
| '''Summary'''
|Denotes the maximum allowed number of parallel [[Transaction Management|transactions]]:
* If {{Option|FAIRLOCK}} is enabled, the number of parallel transactions will never exceed the specified value.
* If the option is disabled (which is the default), the limit only applies to transactions that access databases.
* The main reason for allowing parallel operations is to prevent slow transactions from blocking all other operations. A higher number of parallel operations may increase disk activity and thus slow down queries. In some cases, a single transaction may even give you better results than any parallel activity.
|}
===LOG===
{{Mark|Introduced with Version 7.4}} {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|LOG[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Turns [[Logging]] of server operations and HTTP requests on/off. This option can also be changed when running the server on [[Command-Line Options#BaseX Server|command line]] via <code>-z</code>.
|}
===LOGMSGMAXLEN===
{{Mark|Introduced with Version 7.4}} {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|LOGMSGMAXLEN [length]}}
|-
|}
=Create Options==LOGTRACE===
===CHOP==={|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|CHOPLOGTRACE [boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Chops If BaseX is running as [[Web Application]], trace output (generated via {{Code|fn:trace}}, {{Function|Profiling|prof:dump}} and similar functions) is written to the [[Logging|database logs]]. If this option is disabled, trace output will be redirected to standard error, as it is known from the standalone version of BaseX.|} ==HTTP Services== Most HTTP options are defined in the {{Code|jetty.xml}} and {{Code|web.xml}} configuration files in the <code>[https://github.com/BaseXdb/basex/tree/master/basex-api/src/main/webapp/WEB-INF webapp/WEB-INF]</code> directory. Some additional BaseX-specific options exist that will be set before the web server is started: ===WEBPATH=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|WEBPATH [path]}}|-| '''Default'''|<code>[[Configuration#Database Directory|{home}/webapp]]</code>|-| '''Summary'''|Points to the directory in which all leading the [[Web Application]] contents are stored, including XQuery, Script, [[RESTXQ]] and trailing whitespaces from text nodes while building configuration files:* The option is ignored if BaseX is deployed as [[Web Application#Servlet_Container|web servlet]].* It cannot be assigned via the {{Code|web.xml}} file, as it will be evaluated before the configuration files are parsed.|} ===GZIP=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|GZIP [boolean]}}|-| '''Default'''|<code>false</code>|-| '''Summary'''|Jetty provides a database, [https://www.eclipse.org/jetty/documentation/current/gzip-filter.html Gzip handler] for dynamically uncompressing requests and discards empty text nodescompressing responses. This feature can be enabled if Jetty is started via the [[Web Application|BaseX HTTP Server]]:* The option often reduces can also be enabled on [[Command-Line Options#HTTP Server|command line]] via <code>-g</code>.* It cannot be assigned via the {{Code|web.xml}} file, as it will be evaluated before the configuration files are parsed.* The [https://github.com/eclipse/jetty.project/blob/7cc552013eb4d05cb603ba0bc85d176c97957cd4/jetty-server/src/main/java/org/eclipse/jetty/server/handler/gzip/GzipHandler.java#L187-L211 same defaults] of the database size by up web server will be applied (support for GET requests, exclusion of binaries, MSIE 6.0, etc.).|} ===RESTXQPATH=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|RESTXQPATH [path]}}|-| '''Default'''|''empty''|-| '''Summary'''|Points to 50the directory which contains the [[RESTXQ]] modules of a web application. Relative paths will be resolved against the {{Option|WEBPATH}} directory.|} ===PARSERESTXQ=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|PARSERESTXQ}}|-| '''Default'''|{{Code|3}}|-| '''Summary'''|Timeout after which the RESTXQ directory will be parsed for changes:* If {{Code|0}} is specified, the directory will be parsed every time a RESTXQ function is called.* A positive value defines the idle time in seconds after which parsing will be enforced. The default value is {{Code|3}}: Changes in the RESTXQ directory will be detected after 3 seconds without RESTXQ function calls.* Monitoring is completely disabled if a negative value is specified. See [[RESTXQ#Preliminaries|RESTXQ Preliminaries]] for more details.
|}
===INTPARSERESTXQERRORS=== {{Mark|Updated with BaseX 9.5:}} Additionally suppress stack trace in HTTP response. {| width='100%'
|-
| width='90120' | '''Signature'''|{{Code|INTPARSERESTXQERRORS}}
|-
| '''Default'''
|-
| '''Summary'''
|Uses Reports parsing errors in XQuery modules in the RESTXQ directory and returns the internal XML parser instead of full error message and stack trace to the standard Java XML parserclient. The internal parser By default, this option is fasterenabled. In a production environment, it can be disabled to suppress errors that should not be seen by the user of an API (the full error information can still be looked up in the database logs). See [[RESTXQ#Error Handling|RESTXQ Error Handling]] for more fault tolerant and supports common HTML entities outdetails.|} ===RESTPATH=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|RESTPATH [path]}}|-of| '''Default'''|''empty''|-| '''Summary'''|Points to the-boxdirectory which contains XQuery files and command scripts, but it does not support all features needed for parsing DTDswhich can be evaluated via the [[REST#GET Requests|REST run operation]]. Relative paths will be resolved against the {{Option|WEBPATH}} directory.
|}
===STRIPNSHTTPLOCAL==={{Mark|Introduced with Version 7.4:}}{|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|STRIPNSHTTPLOCAL [boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Strips all namespaces from an XML document before adding it By default, if BaseX is run as [[Web Application]], the database server instance will be started in addition, which can then be addressed by [[Clients]] via the database port (see {{Option|PORT}}).<br/>If the option is set to {{Code|true}}, no database server will be launched.|} ===STOPPORT=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|STOPPORT [port]}}|-| '''Default'''|{{Code|8985}}|-| '''Summary'''|This is the port on which the [[Startup#BaseX HTTP Server|HTTP Server]] can be locally closed:* The listener for stopping the web server will only be started if the specified value is greater than {{Code|0}}.* The option is ignored if BaseX is used as a database[[Web Application]] or started via [[Web Application#Maven|Maven]].* This option can also be changed when running the HTTP server on [[Command-Line Options#BaseX Server|command line]] via <code>-s</code>.
|}
=Create Options= ==General== ===DTDMAINMEM=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|DTDMAINMEM [boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Parses referenced DTDs and resolves XML entitiesIf this option is turned on, new databases will be created in main memory:* Most queries will be evaluated faster in main-memory mode, but all data is lost if the BaseX instance in which the database was created is shut down.* It is not possible to store binary resources in a main-memory database.* A main-memory database will have no disk representation. By defaultHowever, this option it is switched possible to export the database via the {{CodeCommand|falseEXPORT}}command, as many DTDs are located externally, which may completely block and create a new database from the process of creating new databasesexported file in a second step. The * This option will not be available for [[Database Module#CATFILEdb:create|CATFILEdb:create]] option can , because the database would not be changed to locally resolve DTDsaccessible anymore after database creation, i. e., outside the query scope.
|}
===CATFILEADDCACHE=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|CATFILE ADDCACHE [pathboolean]}}
|-
| '''Default'''
|''empty''{{Code|false}}
|-
| '''Summary'''
|Specifies a catalog file If this option is activated, data structures of documents will first be cached to locally resolve DTDs; see disk before being added to the final database. This option is helpful when larger documents need to be added, and if the existing heuristics cannot estimate the entry on [[Catalog Resolver]]s for more detailsinput size (e.g. when adding directories or sending input streams).
|}
 
==Parsing==
===CREATEFILTER===
 {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|CREATEFILTER [filter]}}
|-
|}
===CREATEONLYADDARCHIVES=== {{Mark|Introduced with Version 7.4:}}
{|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|CREATEONLYADDARCHIVES [boolean]}}
|-
| '''Default'''
|{{Code|falsetrue}}
|-
| '''Summary'''
|By default, newly created databases will automatically be opened in order to be available for further processing steps. By setting the flag If this option is set to {{Code|true}}, this will be preventedfiles within archives (ZIP, GZIP, TAR, TGZ, DOCX, etc.) are parsed whenever new databases are created or resources are added to a database.
|}
===ADDARCHIVESARCHIVENAME=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|ADDARCHIVESARCHIVENAME [boolean]}}
|-
| '''Default'''
|{{Code|truefalse}}
|-
| '''Summary'''
|If this option is set to {{Code|true}}, files within the file name of parsed archives (ZIP, GZIP, DOCX, etc.) are parsed whenever new database are created or resources are added to a databasewill be included in the document paths.
|}
===SKIPCORRUPT===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|SKIPCORRUPT[boolean]}}
|-
| '''Default'''
===ADDRAW===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|ADDRAW[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|If this option is activatedenabled, and if new all resources are added to a database, all files that are not filtered out by the [[#CREATEFILTER{{Option|CREATEFILTER]] }} option while being added to a database will be added stored as ''[[Binary Data|raw'' files ]] instead (i.e., in their binary representation).
|}
===PARSER===
 {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|PARSER [type]}}
|-
|-
| '''Summary'''
|Defines a [[Parsers|parser]] for importing new files to the database. Currently, 'Available parsers are {{Code|XML'}}, '{{Code|JSON'}}, '{{Code|CSV'}}, '{{Code|TEXT'}}, '{{Code|HTML' are available as parsers}}, and {{Code|RAW}}. HTML input will be parsed as normal XML files documents if [http:[Parsers#HTML_Parser|Tagsoup]] is not found in the classpath.|} ===CSVPARSER=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|CSVPARSER [options]}}|-| '''Default'''|''empty''|-| '''Summary'''|Specifies the way how CSV data will be parsed. Keys and values are delimited with <code>=</code>, and multiple options are delimited with <code>,</homecode>.ccilThe available options (except for the additional <code>encoding</code> option) are described in the [[CSV Module#Options|CSV Module]].org|-| '''Examples'''|<code>encoding=CP1252,header=true</~cowancode> parses the input as CP1252 and the first line as header.|} ===JSONPARSER=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|JSONPARSER [options]}}|-| '''Default'''|''empty''|-| '''Summary'''|Specifies the way how JSON data will be parsed. Keys and values are delimited with <code>=</XMLcode>, and multiple options are delimited with <code>,</tagsoupcode>. The available options (except for the additional <code>encoding</ Tagsoupcode> option) are described in the [[JSON Module#Options|JSON Module]] is not found in .|-| '''Examples'''|<code>format=jsonml,lax=yes</code> interprets the classpathinput as JSONML and uses lax parsing.
|}
===PARSEROPTHTMLPARSER=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|PARSEROPT HTMLPARSER [options]}}
|-
| '''Default'''
|-
| '''Summary'''
|Defines parser-specific Specifies the way how HTML data will be parsed. Keys and values are delimited with <code>=</code>, and multiple options are delimited with <code>,</code>. The available options; see are described in the [[Parsers#Options|Parsers]] for more informationarticle.|-| '''Examples'''|* <code>encoding=Shift-JIS,nons=true</code> parses the input as Sihft-JIS and suppresses namespaces.* <code>lexical=true</code> preserves comments.
|}
===HTMLOPTTEXTPARSER==={{Mark|Introduced with Version 7.2:}}{|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|HTMLOPT TEXTPARSER [options]}}
|-
| '''Default'''
|-
| '''Summary'''
|Allows to specify TagSoup Specifies the way how TEXT data will be parsed. Keys and values are delimited with <code>=</code>, and multiple options are delimited with <code>,</code>. The available options are listed in the [[Parsers]] article.|-| '''Examples'''|<code>lines=true</code> creates a single element for HTML parsing; see each line of text.|} ==XML Parsing== ===CHOP=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|CHOP [boolean]}}|-| '''Default'''|{{Code|true}}|-| '''Summary'''|Many XML documents include whitespaces that have been added to improve readability. This option controls the [https://www.w3.org/TR/REC-xml/#sec-white-space white-space processing mode] of the XML parser:* With the default value {{Code|true}}, leading and trailing whitespaces from text nodes will be chopped and all empty text nodes will be discarded.* The flag should be turned off if a document contains [[Full-Text#Mixed Content|mixed content]].* The flag can also be turned off on [[ParsersCommand-Line Options#HTML ParserBaseX Standalone|HTML Parsercommand line]] via <code>-w</code>.* If the <code>xml:space="preserve"</code> attribute is attached to an element, chopping will be turned off for more informationall descendant text nodes.  In the following example document, the whitespaces in the text nodes of the {{Code|text}} element will not be chopped:<syntaxhighlight lang="xml"><xml> <title> Demonstrating the CHOP flag </title> <text xml:space="preserve">To <b>be</b>, or not to <b>be</b>, that is the question.</text></xml></syntaxhighlight>It is recommendable to additionally assign <code>indent=no</code> to the {{Option|SERIALIZER}} option; otherwise the serialized documents will automatically be indented.|} ===STRIPNS=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|STRIPNS [boolean]}}|-| '''Default'''|{{Code|false}}|-| '''Summary'''|Strips all namespaces from an XML document and all elements while parsing.
|}
===GCINTPARSE==={{Mark|Introduced with Version 7.4:}}{|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|GC INTPARSE [numberboolean]}}
|-
| '''Default'''
|''2''{{Code|false}}
|-
| '''Summary'''
|Number Uses the internal XML parser instead of explicit consecutive garbage collections runs the standard Java XML parser. Here are some reasons for using the internal parser:* Performance: Documents (in particular small ones) will be parsed faster* Fault tolerance: invalid characters will automatically be replaced with the Unicode replacement character <code>FFFD</code> (&#xFFFD;)* Entities: around 250 HTML entities will be detected and decodedYou will be able to be executed when memory gets low during correctly parse most XML documents with the construction internal parser. Java’s Xerces parser is still used as default, however, because it supports all features of index structuresthe XML standard and advanced DTD features, such as recursive entity expansion.
|}
=Database Options==DTD===
===MAINMEM==={|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|MAINMEMDTD [boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|If Parses referenced DTDs and resolves XML entities. By default, this option is turned onswitched to {{Code|false}}, as many DTDs are located externally, which may completely block the process of creating new databases will be exclusively created in main memory. Most queries will be evaluated faster in main memory mode, but all data is lost if BaseX is shut down. The value of this {{Option|CATFILE}} option will can be assigned once changed to a new database, and cannot be changed after thatlocally resolve DTDs.
|}
===PATHINDEXXINCLUDE=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|PATHINDEXXINCLUDE [boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Creates a path index whenever a new database Resolves XInclude inclusion tags and merges referenced XML documents. By default, this option is createdswitched to {{Code|true}}. A This option is only available if the standard Java XML Parser is used (see {{Option|INTPARSE}}).|} ===CATFILE=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|CATFILE [path index helps ]}}|-| '''Default'''|''empty''|-| '''Summary'''|Semicolon-separated list of XML catalog files to optimize location paths; see resolve URIs. See [[IndexesCatalog Resolver]] s for more details.
|}
 
==Indexing==
 
The following options control the creation of index structures. The current values will be considered if a new database is created. See [[Indexes]] for more details.
===TEXTINDEX===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|TEXTINDEX[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Creates a text index whenever a new database is created. A text index speeds up queries with equality comparisons on text nodes; see . See [[IndexesIndex#Text Index|Text Index]] for more details.
|}
===ATTRINDEX===
 {|width='100%'|-| width='120' | '''Signature'''|{{Code|ATTRINDEX [boolean]}}|-| '''Default'''|{{Code|true}}|-| '''Summary'''|Creates an attribute index whenever a new database is created. An attribute index speeds up queries with equality comparisons on attribute values. See [[Index#Attribute Index|Attribute Index]] for more details.|} ===TOKENINDEX=== {| width='100%'
|-
| width='90120' | '''Signature'''|{{Code|ATTRINDEXTOKENINDEX [boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Creates an attribute a token index whenever a new database is created. An attribute A token index speeds up queries with equality comparisons on searches for single tokens in attribute values; see . See [[IndexesIndex#Token Index|Token Index]] for more details.
|}
===FTINDEX===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|FTINDEX[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Creates a full-text index whenever a new database is created. A full-text index speeds up queries with full-text expressions; see . See [[Index#Full-Text Index|Full-Text Index]] for more details.|} ===TEXTINCLUDE=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|TEXTINCLUDE [names]}}|-| '''Default'''|''empty''|-| '''Summary'''|Defines name patterns for the parent elements of texts that are indexed. By default, all text nodes will be indexed.<br/>Name patterns are separated by commas. See [[Indexes#Selective Indexing|Selective Indexing]] for more details.|} ===ATTRINCLUDE=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|ATTRINCLUDE [names]}}|-| '''Default'''|''empty''|-| '''Summary'''|Defines name patterns for the attributes to be indexed. By default, all attribute nodes will be indexed.<br/>Name patterns are separated by commas. See [[Indexes#Selective Indexing|Selective Indexing]] for more details.|} ===TOKENINCLUDE=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|TOKENINCLUDE [names]}}|-| '''Default'''|''empty''|-| '''Summary'''|Defines name patterns for the attributes to be indexed. By default, tokens in all attribute nodes will be indexed.<br/>Name patterns are separated by commas. See [[Indexes#Selective Indexing|Selective Indexing]] for more details.|} ===FTINCLUDE=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|FTINCLUDE [names]}}|-| '''Default'''|''empty''|-| '''Summary'''|Defines name patterns for the parent elements of texts that are indexed. By default, all text nodes will be indexed.<br/>Name patterns are separated by commas. See [[Indexes#Selective Indexing|Selective Indexing]] for more details.
|}
===MAXLEN===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|MAXLEN[int]}}
|-
| '''Default'''
|-
| '''Summary'''
|Specifies the maximum length of for strings that are to be indexed by the name, path, value, and full-text stored in [[Indexes|index structures]]. The value of this option will be assigned once to a new database, and cannot can only be changed after thatby creating a new database or doing a [[Commands#OPTIMIZE|full optimization]].
|}
===MAXCATS===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|MAXCATS[int]}}
|-
| '''Default'''
===UPDINDEX===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|UPDINDEX[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|If turned on, incremental indexing will be activatedenabled: all update operations will also update the value index structures (texts and attribute values). * The current value of this option will be assigned once to a new database, and cannot databases. It can be changed after thatfor existing databases by running {{Command|OPTIMIZE}} with the {{Code|ALL}} keyword or [[Database_Module#db:optimize|db:optimize($db, true())]]. The advantage of incremental indexes is that * After each update, the value index structures indexes will always be uprefreshed as well. Incremental updates are currently not available for the full-to-datetext index and database statistics. The downside is that updates will take a little bit longer* Find more details in the article on [[Index#Updates|Index Structures]].
|}
===WRITEBACKAUTOOPTIMIZE=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|WRITEBACKAUTOOPTIMIZE [boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Updates If turned on XML nodes are written back , auto optimization will be applied to new databases:* With each update, outdated indexes and database statistics will be recreated.* As a result, the input filesindex structures will always be up-to-date.* However, updates can take much longer, so this option should only be activated for medium-sized databases. Note that no backups * The value of your original files this option will be created if this option is turned onassigned once to a new database. It can be reassigned by running {{Command|OPTIMIZE}} or [[Database_Module#db:optimize|db:optimize]].
|}
===AUTOFLUSHSPLITSIZE==={||-| width='90' | '''Signature'''|{{Code|AUTOFLUSH}}|-| '''Default'''|{{Code|true}}|-| '''Summary'''|Flushes database buffers to disk after each update. If this option is set to {{Code|false}}, bulk operations (multiple single updates) will be evaluated faster. As a drawback, the chance of data loss increases if the database is not explicitly flushed via the [[Commands#FLUSH|FLUSH]] command.|}
===MAXSTAT==={|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|MAXSTAT SPLITSIZE [num]}}
|-
| '''Default'''
|{{Code|300}}
|-
| '''Summary'''
|Specifies This option affects the maximum number of index occurrences printed by the <code>[[CommandsIndexes#INFOPerformance|INFO INDEXconstruction]]</code> commandof new value indexes. It controls the number of index build operations that are performed before writing partial index data to disk:* By default, if the value is set to {{Code|0}}, some heuristics are applied, based on the current memory consumption. Usually, this works fine.* If explicit garbage collection is disabled when running Java (e.g. via the JVM option {{Code|-XX:+DisableExplicitGC}}), you may need to choose a custom split size.* You can e. g. start with {{Code|1000000}} (one million) index operations and adjust this value in the next steps.* The larger the assigned value is, the less splits will take place, and the more main memory will be required.
|}
==Full-Text OptionsIndexing==
===STEMMING===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|STEMMING[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|A new If {{Code|true}}, all tokens will be stemmed during full-text index indexing, using a language-specific stemmer implementation. By default, tokens will stem all tokens and speed up queries on not be stemmed tokens. The same stemming normalization will be applied to all query tokens that are checked against tokens in this indexSee [[Indexes#Full-Text Index|Full-Text Index]] for more details.
|}
===CASESENS===
 {|width='100%'|-| width='90120' | '''Signature'''|{{Code|CASESENS[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|A new full-text index will preserve If {{Code|true}}, the case of all tokenswill be preserved during full-text indexing. The same By default, case normalization will be applied to ignored (all query tokens that are checked against tokens will be indexed in this indexlower case). See [[Indexes#Full-Text Index|Full-Text Index]] for more details.
|}
===DIACRITICS===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|DIACRITICS[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|A new If set to {{Code|true}}, diacritics will be preserved during full-text index will preserve the diacritics of all tokensindexing. The same By default, diacritics normalization will be applied to all query tokens that are checked against tokens in this indexremoved. See [[Indexes#Full-Text Index|Full-Text Index]] for more details.
|}
===LANGUAGE===
 {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|LANGUAGE [lang]}}
|-
|-
| '''Summary'''
|A new full-text index The specified language will use influence the given language to normalize all tokensway how texts will be tokenized and stemmed. This option is mainly important if tokens are to It can be stemmed, or if the tokenization name of a language differs from Western languagesor a language code. See [[Indexes#Full-Text Index|Full-Text Index]] for more details.
|}
===STOPWORDS===
 {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|STOPWORDS [path]}}
|-
|-
| '''Summary'''
|A new If a text file with stop words is specified, frequently used terms contained in that file will be ignored when a full-text index will drop tokens that are listed in the specified stopword listis created. A stopword list may decrease the size of the full text indexand speed up your queries. A standard stopword list See [[Indexes#Full-Text Index|Full-Text Index]] for English texts is provided in the directory more details.|} =Query Options= ===QUERYINFO=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|QUERYINFO [boolean]}}|-| '''Default'''|{{Code|etc/stopwords.txtfalse}} |-| '''Summary'''|Prints more information on internal query rewritings, optimizations, and performance. By default, this info is shown in the official releases[[GUI#Visualizations|Info View]] in the GUI. It can also be activated on [[Command-Line Options#BaseX Standalone|command line]] via <code>-V</code>.
|}
===LSERRORMIXUPDATES=== {| width='100%'|-| width='120' | '''Signature'''|{{Code|MIXUPDATES}}|-| '''Default'''|{{Code|false}}|-| '''Summary'''|Allows queries to both contain updating and non-updating expressions. All updating constraints will be turned off, and nodes to be returned will be copied before they are modified by an updating expression. By default, in compliance with the XQuery Update Facility, this option is set to {{Code|false}}. See [[XQuery Update#Returning Results|Returning Results]] for more details.|} ===BINDINGS=== {| width='100%'
|-
| width='90120' | '''Signature'''|{{Code|LSERROR BINDINGS [errorvars]}}
|-
| '''Default'''
|{{Code|0}}''empty''
|-
| '''Summary'''
|This option specifies Contains external variables to be bound to a query. The string must comply with the following rules:* Variable names and values must be separated by equality signs.* Multiple variables must be delimited by commas.* Commas in values must be duplicated.* Variables may optionally be introduced with a leading dollar sign.* If a variable uses a namespace different to the maximum Levenshtein error for default namespace, it can be specified with the BaseX[http://www.jclark.com/xml/xmlns.htm Clark Notation] or [https://www.w3.org/TR/xquery-30/#id-specific fuzzy match basics Expanded QName Notation].This option. See the page can also be used on [[FullCommand-TextLine Options#Fuzzy_QueryingBaseX Standalone|Fullcommand line]] with the flag <code>-Textsb</code>.|-| '''Examples'''|* <code>$a=1,$b=2</code> &nbsp; binds the values {{Code|1}} and {{Code|2}} to the variables $a and $b* <code>a=1,,2</code> &nbsp; binds the value {{Code|1,2}} to the variable $a* <code>{URI}a=x</code> &nbsp; binds the value {{Code|x}} to the variable $a with the namespace {{Code|URI}}.* In the following [[Commands#Command_Scripts| Command Script]] for more information on fuzzy querying., the value {{Code|hello world!}} is bound to the variable {{Code|$GREETING}}:<syntaxhighlight lang="xquery">SET BINDINGS GREETING="hello world!"XQUERY declare variable $GREETING external; $GREETING</syntaxhighlight>
|}
===WILDCARDSINLINELIMIT===
{{Mark|Removed in Updated with Version 79.35:}} new index supports both fuzzy and wildcard queriesdefault reduced to 50.
{|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|WILDCARDSINLINELIMIT}}
|-
| '''Default'''
|{{Code|false50}}
|-
| '''Summary'''
|If This option controls inlining of XQuery functions:* The XQuery compiler inlines functions to speed up query evaluation.* Inlining will only take place if a new full-text index function body is creatednot too large (i.e., if it will does not contain too many expressions).* With this option, this maximum number of expressions can be specified.* Function inlining can be particularly optimized for wildcards expressionsturned off by setting the value to {{Code|0}}. See * The limit can be locally overwritten via the page on [[Full-TextXQuery Extensions#Function Inlining|%basex:inline]]s for annotation (follow the link to get more information on XQuery Full Textfunction inlining).
|}
===SCORINGUNROLLLIMIT===
{{Mark|Removed in Introduced with Version 79.36:}} new scoring model will focus on lengths of text nodes and match options.
{|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|SCORING [mode]UNROLLLIMIT}}
|-
| '''Default'''
|{{Code|05}}
|-
| '''Summary'''
|A new full-text index will pre-calculate full-text scores. This option enables TF/IDF/based scores in full-text queries and increases main controls the unroll limit:* Loops with few iterations are ''unrolled'' by the XQuery compiler to enable further optimizations.* If the limit is increased, more optimizations will take place, but the memory consumption while indexingand compile time will increase. * See the [[Full-TextXQuery Optimizations#ScoringLoop Unrolling|ScoringLoop Unrolling]] for more information on different scoring typesdetails.
|}
=Query Options==ENFORCEINDEX===
===QUERYINFO==={|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|QUERYINFOENFORCEINDEX [boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Prints more information on internal query Enforces index rewritings, optimizations, and performancein path expressions. The query info will always be printed in the [[GUI#Visualizations|Info View]] in the GUI, or it can be activated with the See [[Startup_OptionsIndexes#BaseX_StandaloneEnforce Rewritings|-V flagEnforce Rewritings]] on command linefor details.
|}
===XQUERY3COPYNODE=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|XQUERY3COPYNODE [boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Enables all When creating new nodes in XQuery via [[XQuery 3https://www.w3.0org/TR/xquery-31/#id-constructors Node Constructors]] features supported by BaseX, all enclosed nodes will be copied, and all resulting nodes will get new node identities. If This step can be very expensive, and it can be disabled with this option is set to {{Code|false}}. The option should be used carefully, as it changes the XQuery parser will only accept expressions standard behavior of the XQuery 1.0 specificationIt should preferrably be used in [[XQuery Extensions#Database Pragmas|Pragmas]].
|}
===SERIALIZETAILCALLS=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|SERIALIZETAILCALLS}}
|-
| '''Default'''
|{{Code|true256}}
|-
| '''Summary'''
|Results Specifies how many stack frames of XQuery expressions will be serialized if [https://en.wikipedia.org/wiki/Tail_call tail-calls] are allowed on the stack at any time. When this option limit is turned onreached, tail-call optimization takes place and some call frames are eliminated. For debugging purposes and performance measurements, this option The feature can be set turned off by setting the value to {{Code|false-1}}.
|}
===BINDINGSWITHDB=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|BINDINGS [vars]WITHDB}}
|-
| '''Default'''
|''empty''{{Code|true}}
|-
| '''Summary'''
|Contains external variables to be bound to a query. Variable names and values are separated by equality signs, and multiple variables are delimited by commas. Variables may optionally be introduced with a leading dollar sign. Commas that occur in the value itself are encoded by duplication. If a variable uses a namespace different to the By default namespace, it can be resources specified with the via [[httpDatabases#XML Documents|fn://www.jclark.com/xml/xmlns.htm Clark Notationdoc]] or and [[httpDatabases#XML Documents|fn://www.w3.org/TR/xquery-30/#id-basics Expanded QName Notationcollection]]are looked up both in the database and in the file system.|-| '''Examples'''|<code>$a=1,$b=2</code> &nbsp; binds the values If you always use {{CodeFunction|1}} and {{CodeDatabase|2db:open}} to the variables $a and $b<br/><code>a=1access databases,,2</code> &nbsp; binds the value {{Code|1,2}} it is recommendable to the variable $a<br/><code>{URI}a=x</code> or <code>'URI'disable this option:a=x</code> &nbsp; binds * No locks will be created for the value {{Codetwo functions (see [[Transaction Management#Limitations|x}} limitations of database locking]] for more details).* Access to local and external resources will be faster, as the variable $a with the namespace {{Code|URI}}database lookup will be skipped.
|}
===SERIALIZERDEFAULTDB=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|SERIALIZER [params]DEFAULTDB}}
|-
| '''Default'''
|''empty''{{Code|false}}
|-
| '''Summary'''
|Contains parameters for serializing queries; see If this option is turned on, paths specified in the [[SerializationDatabases#XML Documents|fn:doc]] for more details. Keys and values are separated by equality signs, and multiple parameters are delimited by commas.|-| '''Example'''[[Databases#XML Documents|<code>encoding=US-ASCII,omit-xml-declaration=no</code> fn: sets collection]] functions will first be resolved against a database that has been opened in the global context outside the query (e.g. by the encoding to {{CodeCommand|US-ASCIIOPEN}} and prints command). If the path does not match any existing resources, it will be resolved as described in the XML declarationarticle on [[Databases#Access Resources|accessing database resources]].
|}
===EXPORTERFORCECREATE=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|EXPORTER FORCECREATE [paramsboolean]}}
|-
| '''Default'''
|''empty''{{Code|false}}
|-
| '''Summary'''
|Contains parameters for exporting all resources of a By activating this option, database; see instances will be created with the XQuery functions [[SerializationDatabases#XML Documents|fn:doc]] for more details. Keys and values are separated by equality signs, multiple parameters are delimited by commas[[Databases#XML Documents|fn:collection]].
|}
===QUERYPATHCHECKSTRINGS=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|QUERYPATH CHECKSTRINGS [pathboolean]}}
|-
| '''Default'''
|''empty''{{Code|true}}
|-
| '''Summary'''
|Contains By default, characters from external sources that are invalid in XML will trigger an error. If the path (''base URI'') option is set to <code>false</code>, these characters will be replaced with the executed query Unicode replacement character <code>FFFD</code> (default: ''empty''&#xFFFD;). This directory will be used to resolve relative paths to documentsThe option affects [[Java Bindings]] and string conversion and input functions such as [[Archive Module#archive:create|archive:create]], [[Archive Module#archive:extract-text|archive:extract-text]], query modules[[Archive Module#archive:update|archive:update]], and other resources addressed in a query[[ZIP Module#zip:text-entry|zip:text-entry]].
|}
===CACHEQUERYLSERROR=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|CACHEQUERYLSERROR [error]}}
|-
| '''Default'''
|{{Code|false0}}
|-
| '''Summary'''
|Caches This option specifies the query results before returning them to the clientmaximum Levenshtein error for fuzzy full-text matching. This option may be set to By default, if {{Code|true0}} if is assigned, the whole result error value is needed calculated dynamically. See [[Full-Text#Fuzzy_Querying|Fuzzy Querying]] for further operations (such as is e.g. the case in the GUI of BaseX)more details.
|}
===FORCECREATERUNQUERY=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|FORCECREATERUNQUERY [boolean]}}
|-
| '''Default'''
|{{Code|falsetrue}}
|-
| '''Summary'''
|By activating this Specifies if a query will be executed or parsed only. This option, the XQuery {{Codecan also be changed on [[Command-Line Options#BaseX Standalone|doc()}} and {{Code|collection()}} functions will create database instances for the addressed input filescommand line]] via <code>-R</code>.
|}
===RUNS===
 {|width='100%'
|-
| width='90120' | '''Signature'''
|{{Code|RUNS [num]}}
|-
|-
| '''Summary'''
|Specify number of runs Specifies how often a query will be evaluated. The result is executed. Results are printed a single time serialized only once, and evaluation the measured times are averages of all runs. This option can also be changed on [[Command-Line Options#BaseX Standalone|command line]] via <code>-r</code>.
|}
=Serialization Options=
 
===SERIALIZE===
 
{| width='100%'
|-
| width='120' | '''Signature'''
|{{Code|SERIALIZE [boolean]}}
|-
| '''Default'''
|{{Code|true}}
|-
| '''Summary'''
|Results of XQuery expressions will be serialized if this option is turned on. For debugging purposes and performance measurements, this option can be set to {{Code|false}}. It can also be turned off on [[Command-Line Options#BaseX Standalone|command line]] via <code>-z</code>.
|}
 
===SERIALIZER===
 
{| width='100%'
|-
| width='120' | '''Signature'''
|{{Code|SERIALIZER [params]}}
|-
| '''Default'''
|''empty''
|-
| '''Summary'''
|Parameters for [[Serialization|serializing]] query results. The string must comply with the following rules:
* Variable names and values must be separated by equality signs.
* Multiple variables must be delimited by commas.
* Commas in values must be duplicated.
The option can also be used on [[Command-Line Options#BaseX Standalone|command line]] with the flag <code>-s</code>.
|-
| '''Examples'''
|
* <code>indent=no</code> : disables automatic indentation of XML nodes. This is usually a good choice when working with [[Full-Text#Mixed Content|Mixed-Content Data]].
* <code>encoding=US-ASCII,omit-xml-declaration=no</code> : sets the encoding to {{Code|US-ASCII}} and prints the XML declaration.
* <code>item-separator=,,</code> : separates serialized items by a single comma.
|}
 
===EXPORTER===
 
{| width='100%'
|-
| width='120' | '''Signature'''
|{{Code|EXPORTER [params]}}
|-
| '''Default'''
|''empty''
|-
| '''Summary'''
|Contains parameters for exporting resources of a database and writing files after updates via the {{Option|WRITEBACK}} option. Keys and values are separated by equality signs, multiple parameters are delimited by commas. See [[Serialization]] for more details.
|-
| '''Examples'''
|
* <code>indent=no,omit-xml-declaration=no</code> : disables automatic indentation of XML nodes, outputs the XML declaration.
|}
===XMLPLAN===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|XMLPLAN[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Prints the execution plan of an XQuery expression in its XML representation. This option can also be activated on [[Command-Line Options#BaseX Standalone|command line]] via <code>-x</code>.
|}
===COMPPLAN===
 {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|COMPPLAN[boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Creates Generates the query plan , which can be activated via {{Option|XMLPLAN}}, before or after the query compilation step. Query plans might change due to optimizationsThis option can also be activated on [[Command-Line Options#BaseX Standalone|command line]] via <code>-X</code>.
|}
===DOTPLANFULLPLAN=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|DOTPLANFULLPLAN [boolean]}}
|-
| '''Default'''
|-
| '''Summary'''
|Visualizes Attaches the execution plan file path, line and column of an XQuery expression with [http://www.graphviz.org dotty] and saves its dot file the expressions in the original query string to the query directoryplan. Values (items and sequences) have no input information attached.
|}
=Other Options= ===DOTCOMPACTAUTOFLUSH=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|DOTCOMPACTAUTOFLUSH [boolean]}}
|-
| '''Default'''
|{{Code|falsetrue}}
|-
| '''Summary'''
|Chooses Flushes database buffers to disk after each update. If this option is set to {{Code|false}}, bulk operations (multiple single updates) will be evaluated faster. As a compact dot representationdrawback, the chance of data loss increases if the database is not explicitly flushed via the {{Command|FLUSH}} command.
|}
===DOTDISPLAYWRITEBACK=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|DOTDISPLAYWRITEBACK [boolean]}}
|-
| '''Default'''
|{{Code|truefalse}}
|-
| '''Summary'''
|Visualizes Propagates updates on main-memory instances of files that have been retrieved via [[Databases#XML Documents|fn:doc]] and [[Databases#XML Documents|fn:collection]] back to disk:* This option can also be activated on [[Command-Line Options#BaseX Standalone|command line]] via <code>-u</code>.* Please take in mind that no backup will be created from your original files.* The serialization options can be controlled via the dot representation after the query execution{{Option|EXPORTER}} option.
|}
===DOTTYMAXSTAT=== {|width='100%'
|-
| width='90120' | '''Signature'''|{{Code|DOTTY MAXSTAT [pathnum]}}
|-
| '''Default'''
|{{Code|dotty30}}
|-
| '''Summary'''
|Location Specifies the maximum number of index occurrences printed by the {{CodeCommand|dottyINFO INDEX}} executablecommand.
|}
=Changelog=
;Version 9.6* Added: {{Option|UNROLLLIMIT}} ;Version 9.5* Updated: {{Option|INLINELIMIT}}: default reduced to 50.* Updated: {{Option|RESTXQERRORS}}: additionally suppress stack trace in HTTP response ;Version 9.4* Added: {{Option|LOGTRACE}} ;Version 9.3* Added: {{Option|WITHDB}}, {{Option|GZIP}} ;Version 9.2* Added: {{Option|RESTXQERRORS}}, {{Option|FULLPLAN}}* Removed: <code>DOTPLAN</code>, <code>DOTCOMPACT</code> ;Version 9.0* Added: {{Option|ENFORCEINDEX}}, {{Option|COPYNODE}}, {{Option|IGNOREHOSTNAME}} ;Version 8.6* Added: {{Option|FAIRLOCK}}, {{Option|PARSERESTXQ}}* Removed: {{Code|GLOBALLOCK}} (exclusive use of database lock)* Removed: {{Code|QUERYPATH}} (will now be internally assigned)* Removed: {{Code|CACHERESTXQ}} (replaced with PARSERESTXQ) ;Version 8.5* Added: {{Option|CACHETIMEOUT}}, {{Option|LOGPATH}}* Updated: {{Option|AUTHMETHOD}}: {{Code|custom}} value added. ;Version 8.4* Added: {{Option|TOKENINDEX}}, {{Option|TOKENINCLUDE}}* Added: {{Option|SPLITSIZE}} (replacing <code>INDEXSPLITSIZE</code> and <code>FTINDEXSPLITSIZE</code>)* Removed: <code>INDEXSPLITSIZE</code>, <code>FTINDEXSPLITSIZE</code> ;Version 8.3* Added: {{Option|CACHERESTXQ}}, {{Option|TEXTINCLUDE}}, {{Option|ATTRINCLUDE}}, {{Option|FTINCLUDE}}, {{Option|ARCHIVENAME}} ;Version 8.2* Removed: <code>EVENTPORT</code>, <code>CACHEQUERY</code> ;Version 8.1* Added: {{Option|IGNORECERT}}, {{Option|RESTPATH}} ;Version 8.0* Added: {{Option|MIXUPDATES}}, {{Option|AUTOOPTIMIZE}}, {{Option|AUTHMETHOD}}, {{Option|XINCLUDE}}* Updated: {{Option|PROXYPORT}}: default set to 0; will be ignored. {{Option|PROXYHOST}}, {{Option|NONPROXYHOSTS}}: empty strings will be ignored. ;Version 7.48.1* Updated: {{Option|ADDARCHIVES}}: parsing of TAR and TGZ files.
;Version 7.8 * Added: pragma expression for temporarily setting database options{{Option|CSVPARSER}}, {{Option|JSONPARSER}}, {{Option|TEXTPARSER}}, {{Option|HTMLPARSER}}, {{Option|INLINELIMIT}}, {{Option|TAILCALLS}}, {{Option|DEFAULTDB}}, {{Option|RUNQUERY}}* Updated: {{Option|WRITEBACK}} only applies to main-memory document instances.* Updated: {{Option|DEBUG}} option can be changed at runtime by users with admin permissions.* Updated: default of {{Option|INTPARSE}} is now {{Code|false}}.* AddedRemoved: <code>[[#STRIPNS|STRIPNS]]HTMLOPT</code>(replaced with {{Option|HTMLPARSER}}), <code>[[#LOGMSGMAXLEN|LOGMSGMAXLEN]]PARSEROPT</code>(replaced with parser-specific options), <code>[[#GC|GC]]DOTDISPLAY</code>, <code>[[#LOG|LOG]]DOTTY</code> ;Version 7.7* Added: {{Option|ADDCACHE}}, {{Option|CHECKSTRINGS}}, {{Option|FTINDEXSPLITSIZE}}, {{Option|INDEXSPLITSIZE}} ;Version 7.6* Added: {{Option|GLOBALLOCK}}* Added: store local options in configuration file after {{Code|# Local Options}} comments. ;Version 7.5* Added: options can now be set via system properties* Added: a pragma expression can be used to locally change database options* Added: {{Option|USER}}, {{Option|PASSWORD}}, {{Option|LOG}}, {{Option|LOGMSGMAXLEN}}, {{Option|WEBPATH}}, {{Option|RESTXQPATH}}{{Option|HTTPLOCAL}}, {{Option|CREATEONLY}}, {{Option|STRIPNS}}* Removed: {{Code|HTTPPATH}}; {{Code|HTTPPORT}}: {{Code|jetty.xml}} configuration file is used instead* Removed: global options cannot be changed anymore during the lifetime of a BaseX instance
;Version 7.3
 * Updated: <code>[[#KEEPALIVE{{Option|KEEPALIVE]]</code>}}, <code>[[#TIMEOUT{{Option|TIMEOUT]]</code>}}: default values changed
* Removed: {{Code|WILDCARDS}}; new index supports both fuzzy and wildcard queries
* Removed: {{Code|SCORING}}; new scoring model will focus on lengths of text nodes and match options
;Version 7.2
 * Added: <code>[[#PROXYHOST{{Option|PROXYHOST]]</code>}}, <code>[[#PROXYPORT{{Option|PROXYPORT]]</code>}}, <code>[[#NONPROXYHOSTS{{Option|NONPROXYHOSTS]]</code>}}, <code>[[#HTMLOPT{{Option|HTMLOPT]]</code>}}* Updated: <code>[[#TIMEOUT{{Option|TIMEOUT]]</code>}}: ignore timeout for admin users
;Version 7.1
 * Added: <code>[[#ADDRAW{{Option|ADDRAW]]</code>}}, <code>[[#MAXLEN{{Option|MAXLEN]]</code>}}, <code>[[#MAXCATS{{Option|MAXCATS]]</code>}}, <code>[[#UPDINDEX{{Option|UPDINDEX]]</code>}}* Updated: <code>[[#BINDINGS{{Option|BINDINGS]]</code>}}
;Version 7.0
 * Added: <code>[[#SERVERHOST{{Option|SERVERHOST]]</code>}}, <code>[[#KEEPALIVE{{Option|KEEPALIVE]]</code>}}, <code>[[#AUTOFLUSH{{Option|AUTOFLUSH]]</code>}}, <code>[[#QUERYPATH{{Option|QUERYPATH]]</code>}}
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