A unique identifier for a particular enumerated value for a particular Unicode character property.

• The identifiers used for property value aliases contain only ASCII alphanumeric characters or the underscore character, or have the special value "n/a".
• Short and long forms for property value aliases are defined. For example, "Currency_Symbol" is the long form and "Sc" is the short form of the property value alias for the currency symbol value of the General Category property.
• Property value aliases are defined in the file PropertyValueAliases.txt in the Unicode Character Database.
• Property value aliases are unique identifiers only in the context of the particular property with which they are associated. The same identifier string might be associated with an entirely different value for a different property. The combination of a property alias and a property value alias is, however, guaranteed to be unique.
• Property value aliases referring to values of normative properties are themselves normative.