Reference to grout specification. Reused bydiggs:RIColumnSpecificationType, whose own use-site targets diggs:GroutSpecificationspecifically - the sole remaining use as of GB2 (2026-09-28), a component referencebetween two specification-family objects, not a design/specification duality (seethat use-site's own documentation). diggs:DesignGroutMixType anddiggs:TrialGroutBatchType no longer declare this element; both express "thespecification this object must satisfy" through the generic programSpecificationRefinstead.
The gml:identifier value of the referenced feature, as a fully qualifiedvalue. It gives an alternative to the gml:id in xlink:href for findingthe referenced feature, mainly to reference a feature by a globallyunique identifier and where naming conflicts occur with gml:id whenaccessing data in external files.
<element name="groutSpecificationRef" type="diggs:FeatureReferenceType"><annotation><documentation>Reference to grout specification. Reused by diggs:RIColumnSpecificationType, whose own use-site targets diggs:GroutSpecification specifically - the sole remaining use as of GB2 (2026-09-28), a component reference between two specification-family objects, not a design/specification duality (see that use-site's own documentation). diggs:DesignGroutMixType and diggs:TrialGroutBatchType no longer declare this element; both express "the specification this object must satisfy" through the generic programSpecificationRef instead.</documentation></annotation></element>