Summary and Outlook This document provides a metamodel for specifying data specification templates for defining concept descriptions for properties and values. These data specification templates are conformant to IEC 61360. This document is part of the document series "Specification of the Asset Administration Shell". Additional parts of the document series cover (see [14]): the information model that is the basis for file exchange and interface payload definition (IDTA-01001, Part 1), interfaces and APIs for accessing the information of Asset Administration Shells (access, modify, query, and execute information and active functionality) (IDTA-01002, Part 2), a file exchange format AASX (IDTA-01005, Part 5), Additional parts are in preparation: security aspects including access control (IDTA-01004, part 4), physical units as used to define the semantics of quantifiable properties in IEC 61360 (IDTA-01003-b, Part 3b).