Changes

In BaseX, all updates are performed on database nodes or in main memory. Update By default, update operations thus never affect the original input file. You can, however, use the [[Commands#EXPORT|EXPORT]] command or the fn:put() function The following solutions exist to create an updated write XML file.documents and binary resources to disk:

Moreover changes in your database are * The [[Commands#EXPORT|EXPORT]] command can be used write all resources of a databases to disk.* Functions like <code>[[#fn:put|fn:put]]</code> or <code>[[File Module#file:write|file:write]]</code> can be used to write single XML documents to disk. With <code>[[File Module#file:write-binary|file:write-binary]]</code>, you can write binary resources.* Updates on main-memory instances of files that have been retrieved via {{Code|fn:doc}} or {{Code|fn:collection}} will be propagated back to disk when the original input file if the database option <code>[[Options#WRITEBACK|WRITEBACK]]</code> option is turned on. This option can also be activated on [[Command-Line Options#BaseX Standalone|command line]] via <code>-u</code>. Make sure you back up the original data documents before running your queries.

By default, index Index structures are discarded after an updateoperation, and their maintenance operations when [[Options#UPDINDEX|UPDINDEX]] is turned off (which is left to the userdefault).See more More details are found in the article on [[IndexesIndex#Updates|Indexes: UpdatesIndexing]].