exists

The exists accessor is exported by the urn:org:ten60:netkernel:ext:sys module. Import this module to gain access to the accessor.

URI

active:exists

Argument	Rules	Description
operand	Mandatory	the resource to test.

<instr>
  <type>exists</type>
  <operand>
    <uri>file:/a.xml</uri>
  </operand>
  <target>var:result</target>
</instr>

The exists accessor is provided for use with the DMPL language. It is more efficient to use the following NKF method with scripting languages:

INKFConvenienceHelper.exists() issue EXISTS request to resource

The exists accessor checks for the existence of a resource and returns a boolean response.

Data Accessors that currently support exists are file:, and ffcpl:.