Changes

You can access multiple databases in a single query:

for $i in 1 to 100

return db:open('books' || $i)//book/title

Two more functions are available for retrieving information on database nodes:

The {{Code|fn:document-uri}} and {{Code|fn:base-uri}} functions return URIs that can also be reused as arguments for the {{Code|fn:doc}} and {{Code|fn:collection}} functions. As a result, the following example query always returns {{Code|true}}:

every $c in collection('anyDB')

satisfies doc-available(document-uri($c))

If the argument of {{Code|fn:doc}} or {{Code|fn:collection}} does not start with a valid database name, or if the addressed database does not exist, the string is interpreted as URI reference, and the documents found at this location will be returned. Examples:

* {{Code|doc("http://web.de")}}: retrieves the addressed URI and returns it as a main-memory document node.

* {{Code|collection("/path/to/docs")}}: returns a main-memory collection with all XML documents found at the addressed file path.

If the API you use does not support binary output (this is e.g. the case for various [[Clients|Client]] language bindings), you need to convert your binary data to its string representation before returning it to the client:

string(db:retrieve('multimedia', 'sample.avi'))

==HTTP Services==

The following commands create an empty database, add two resources, explicitly flush data structures to disk, and finally delete all inserted data:

CREATE DB example

SET AUTOFLUSH false

FLUSH

DELETE /

You may also use the BaseX-specific [[Database Module|XQuery Database Functions]] to create, add, replace, and delete XML documents:

let $root := "/path/to/xml/documents/"

for $file in file:list($root)

return db:add("database", $root || $file)

Last but not least, XML documents can also be added via the GUI and the ''Database'' menu.