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→Options, Pragmas, Annotations
By default, access to external resources (files on hard disk, HTTP requests, ...) is not controlled by the transaction monitor of BaseX. You can use custom XQuery locks to do so:
===Option DeclarationsOptions, Pragmas, Function Annotations===
{{Mark|Introduced with Version 9.1}}: locks via pragmas and function annotations.
* You can declare custom read and write locks via options, pragmas or function annotations.
* The value of the lock may contain one or multiple lock keys (separated with commas). The default value is an empty string.
* Similar to the internal database locks, write locks block all other operations while read locks allow parallel access.
* The internal locks and XQuery locks can co-exist (there will be no conflicts, even if your lock string equals the name of a database that will be locked by the transaction manager).
