MarkLogic Server 11.0 Product Documentation
xdmp.filesystemFileExists

xdmp.filesystemFileExists(
   pathname as String,
   [host as (Number|String)?]
) as Boolean

Return true if a file exists on a host; otherwise false.

Parameters
pathname	Pathname of the file on a certain host.
host	ID of the host. If omitted, uses the current host ID (for example, the output of a call to `xdmp:host`).

http://marklogic.com/xdmp/privileges/xdmp-filesystem-file-exists

xdmp.filesystemFileExists("/testdata1/a.jpg");
=> true

MarkLogic Server 11.0 Product Documentationxdmp.filesystemFileExists