.. highlight:: xml .. _output-constraint-xml: Output constraint ================= The output costraint document defines the levels and variables used in report. An example of the document contents is given below, for a comprehensive description of all the possible content options see the `schema document `_. Data continuation and abbreviated content expressed as …: The root level tag contains a reference to the schema document which is used to validate the content of the XML document:: Output constraint includes the repoting data levels and variables. Here from level ``comp_unit`` and ``stratum`` will be reported attributes `SC MAIN_SP Age` and `SP Age BA`, respectively:: … comp_unit SC MAIN_SP Age stratum SP Age BA