Its \ .\ ``attribute``\ .\  attribute \ ^\ ``prefix_condition:prefix_condition``\ ^\  with '``prefix``'
=======================================================================================================

.. container:: prewrap

   | '
   | Given its attribute X must start with Y or Z
   | '
   | Is almost the same as
   | '
   | Given its attribute X
   | Its value must start with Y or Z
   | '
   | 
   | However, when navigating the context stack and there is a subsequent step,
   | it is sometimes preferable to include the statement within a single step.
   | 
   | For example;
   | '
   | (1)Given an entity IfcBuildingStorey
   | (2)Given its attribute X must start with Y or Z
   | (3)Given its relating Wall
   | (4)Then Some condition
   | '
   | In this case, it is challenging to split step (2) into two separate steps and then return to the
   | relating Wall (step 3) of the entity in step (1). This is because the instances in the context will be
   | the content of the attribute X of IfcBuildingStorey rather than the storey itself."

Usages:
~~~~~~~

 - **Given** *Its .Name. attribute ^does not start^ with 'EPSG:'*

   :doc:`/features/GRF006_WKT-specification-for-missing-EPSG`:15

 - **Given** *Its .PredefinedType. attribute ^does not start^ with 'NOTDEFINED'*

   :doc:`/features/OJT001_Object-predefined-type`:27

 - **Given** *its .Name. attribute ^starts^ with 'Pset_'*

   :doc:`/features/PSE001_Standard-properties-and-property-sets-validation`:9

 - **Given** *its .Name. attribute ^starts^ with 'Qto_'*

   :doc:`/features/QTY001_Standard-quantities-and-quantity-sets-validation`:9