The task of creating specific references rests on specifications that qualify how parts of resources can be addressed. The lack of standards for fragment identifiers has lead to the problem that links, metadata and references merely point to whole resources. Although it is suggested that fragment identification is specified with a media type’s MIME type registration, there are few formats that provide a fragment identification scheme. Furthermore formats that specify fragment identification schemes have not agreed on a common set of requirements.In this paper we present an overview of the current status of interoperable fragment definitions, point out promising activities that promote interoperable fragment definitions and suggest strategies to promote uniform fragment identifiers. Additionally a set of requirements is defined and described to ease the development of fragment identification standards.

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