======Mark Logic Command: exists======
Detects if a document exists on a Mark Logic server

====Synopsis====
exists [-c uri|-connect uri] document

====Description====
Checks to see if a document exists on the MarkLogic server.

||-c,-connect uri||Use the connection string instead of $MLCONNECT||
||document|| uri of the document to test||

====Example====
Assuming the prefix "ml" is imported as the marklogic module, tests to see if the directory /test/test.xml exists

%%
if ml:exists /test/test.xml ; then
echo /test/test.xml exists
else
echo /test/test.xml doesnt exist
fi
%%

Example, safely delete /test/test.xml only if it exists

%%
ml:exists /test/test.xml && ml:del /test/test.xml
%%


To check if directory exists use [[MarkLogicDirexists direxists]]
====Implementation====

exists is implemented as an xsh script which simply calls exists(doc(uri)). The source of the script is

%%
# return true if document exists else return false
_opts=$<(xgetopts -a -p "c=connect:,t=text" -ps -- "$@")
shift $?

:query $_opts -b -q <{{
declare variable $uri external ;
exists(doc($uri))
}}> -v uri $1
%%






----
[[ModuleMarkLogic MarkLogic Extension Module]]