Changes

Fragments require less memory for small XML structures, but database nodes are more efficient for larger amounts of data. Fragments nodes can be converted to database nodes by applying a [[XQuery_Update#Main-Memory Updates|main-memory update]] with an empty body to a node:

<xml>hello world</xml> update { }

</pre>

| '''Examples'''

| Export all files as text:<br/>

db:export("DB", "/home/john/xml/texts", map { 'method': 'text' })

</pre>

The following code can be used to export parts of the database:

let $target := '/home/john/xml/target'

for $doc in db:get('DB', 'collection')

* {{Code|db:put("DB", document { <a/> }, "docs/dir/doc.xml")}} replaces the content of the document {{Code|docs/dir/doc.xml}} in the database {{Code|DB}} with the specified document node.

The following query can be used to import files from a directory to a database:

let $source := '/home/john/xml/source'

for $file in file:list($source, true())

* {{Code|db:put-binary('DB', file:read-binary('video.mov'), 'video/sample.mov')}} stores the addressed video file at the specified location.

* With the following query, you can copy the binary resources of one database into another:

let $db := 'db'

let $src-path := 'src/'

* {{Code|db:put-value('DB', 1 to 10000, 'sequence')}} stores a numeric range in the database.

* With the following query, a map with countries and associated cities is stored in a database. The value resource can e.g. be used as index in future queries:

db:put-value(

'factbook',