2.11.4 TaggedPropertyValue Structure
As a rule, property tags are not specified explicitly in ROP buffers. To save space, property tags are specified implicitly by a previous operation and only the property values are put in the buffer. But under some circumstances a TaggedPropertyValue structure is used to explicitly include the property type and ID in the buffer.
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PropertyTag (4 bytes): A PropertyTag structure, as specified in section 2.9, giving the values of the PropertyId and PropertyType fields for the property.
PropertyValue (variable): A PropertyValue structure, as specified in section 2.11.2.1. specifying the value of the property. Its syntax is specified by the PropertyType field of the PropertyTag structure, and its semantics by the PropertyId field of the PropertyTag structure.