``GRF004`` Valid EPSG prefix in coordinate reference system - v1
========================================================================================================================================================================================================

.. parsed-literal::

   001 | \@implementer-agreement
   002 | \@GRF
   003 | \@version1
   004 | Feature: GRF004 - Valid EPSG prefix in coordinate reference system
   005 | The rule verifies that if the name of a CRS starts with "EPSG:", it must refer to a valid code from the official EPSG geodetic parameter dataset.
   006 | EPSG code validation is performed using the pyproj library, which includes a local copy of the official EPSG dataset (https://epsg.org) maintained by IOGP.
   007 | For reference: https://pyproj4.github.io/pyproj/stable/api/database.html
   008 | 
   009 |   Background:
   010 | 
   011 |       :doc:`Given A model with Schema 'IFC4' or 'IFC4.3' </steps/givensattributespy_Afile_or_modelwithfieldvalues>`
   012 | 
   013 |   Scenario Outline: Validate EPSG code in IfcCoordinateReferenceSystem
   014 | 
   015 |       :doc:`Given An .IfcCoordinateReferenceSystem. </steps/stepsentity_selectionpy_Anentity_opt_stmt>`
   016 |       :doc:`Given Its attribute .\<attribute\>. </steps/stepsattribute_selectionpy_Itsattributeattribute>`
   017 |       :doc:`Given Its value ^starts^ with 'EPSG:' </steps/givensattributespy_Itsvalueprefix_conditionprefix_conditionwithprefix>`
   018 | 
   019 |       :doc:`Then The value must refer to a valid EPSG code </steps/stepscrspy_ThevaluemustrefertoavalidEPSGcode>`
   020 | 
   021 |       Examples:
   022 |           | attribute     |
   023 |           | Name          |
   024 |           | GeodeticDatum |
   025 | 
   026 | 
   027 |   Scenario: Validate EPSG code for the vertical datum of IfcProjectedCRS
   028 | 
   029 |       :doc:`Given An .IfcProjectedCRS. </steps/stepsentity_selectionpy_Anentity_opt_stmt>`
   030 |       :doc:`Given Its attribute .VerticalDatum. </steps/stepsattribute_selectionpy_Itsattributeattribute>`
   031 |       :doc:`Given Its value ^starts^ with 'EPSG:' </steps/givensattributespy_Itsvalueprefix_conditionprefix_conditionwithprefix>`
   032 | 
   033 |       :doc:`Then The value must refer to a valid EPSG code </steps/stepscrspy_ThevaluemustrefertoavalidEPSGcode>`
   034 | 

.. rubric:: Version history

.. list-table::
   :header-rows: 1

   * - Version
     - Tag
     - Date
     - Commit
     - Rule link
   * - v1
     - :tag:`v0.7.7`
     - 2025-06-08
     - :commit:`1b873abc87fa26cbd09fac2909d6ccea52f14546`
     - `view <https://github.com/buildingSMART/ifc-gherkin-rules/blob/release/0.7.7/features/rules/GRF/GRF004_Valid-EPSG-prefix-in-coordinate-reference-system.feature>`_