This page is deprecated; the VOStandard extension standard is now track via VOStandard.
The version 1.0 registry data model uses Resource Identifiers in several places to identify which standard a particular resource follows. By using IVOA resource identifiers in this way there is an implicit assumption that the standard is itself registered - though no formal requirement to do so. The VOStandard data model and schema provides a framework in which IVOA standards can be described in the registry.