ClassAds
========

This chapter presents HTCondor's ClassAd mechanism in three parts.

The first part may be of interest to advanced job submitters as
well as HTCondor administrators: it
describes how to write ClassAds and ClassAd expressions, including
details of the ClassAd language syntax, evaluation semantics, and
its built-in functions.

The second part is likely only of interest to HTCondor
administrators: it describes the generic mechanism
provided by HTCondor to transform ClassAds, as used in the schedd
and the job routers, and as available via a command-line tool.

The third part describes how to format ClassAds for printing from
command-line tools like `condor_q`, `condor_history`, and `condor_status`.
Advanced users may specify their own custom formats, or adminstrators
may set custom defaults.

.. toctree::
   :maxdepth: 2
   :glob:

   classad-mechanism
   transforms
   print-formats