This represents a part of, fragment of, or a sub-function within, an object . Its syntax and semantics are defined by the application responsible for the object, or the specification of the content type of the object. The only definition here is of the allowed characters by which it may be represented in a URL.

Specific syntaxes for representing fragments in text documents by line and character range, or in graphics by coordinates, or in structured documents using ladders, are suitable for standardization but not defined here.

The fragment-id follows the URL of the whole object from which it is separated by a hash sign (#). If the fragment-id is void, the hash sign may be omitted: A void fragment-id with or without the hash sign means that the URL refers to the whole object.

While this hook is allowed for identification of fragments, the question of addressing of parts of objects, or of the grouping of objects and relationship between continued and containing objects, is not addressed by this document.

Fragment identifiers do NOT address the question of objects which are different versions of a "living" object, nor of expressing the relationships between different versions and the living object.

There is no implication that a fragment identifier refers to anything which can be extracted as an object in its own right. It may, for example, refer to an indivisible point within an object.