XML Property Set Schema published
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buildingSMART Model Support group has published the Property Set Definition Schema, PSD, to allow using an XML Schema and Documents to publish the definition of property sets and included properties, including Name, Description, Data Type, Minimum/Maximum Values for each property. It also allows for using multi-lingual names and descriptions for localizing the property definitions.
The IFC Specification includes a utilization of PSD for common properties, such as Pset_SpaceCommon for entities in the IFC schema, like IfcSpace. However PSD can also been used in other circumstances.

