pubid
Pubid, short for public identifier, is a string used to identify a public resource, most commonly a document type definition (DTD) or other formal resource in SGML and XML. It functions as a symbolic name that can be mapped to a concrete location by the parser or a catalog.
In practice, pubid appears in DOCTYPE declarations as the public identifier portion of a two-part identifier.
Public identifiers follow a formal syntax developed for SGML and adopted by XML; they often begin with
Examples include public identifiers for well-known standards such as XHTML and MathML, paired with a corresponding
See also: Doctype declaration, DTD, public identifier, system identifier, XML catalogs.