RDF builds standards for XML applications
so that they can interoperate and intercommunicate more easily, facilitating
data and system integration and interoperability. RDF is a simple general-purpose,
metadata language for representing information on the Web and provides a model
for describing and creating relationships between resources. A resource can be a
thing, such as a person, a song, or a Web page. With RDF it is possible to add predefined
modeling primitives for expressing semantics of data to a document without
making any assumptions about the structure of the document. In a first approach, it
may seem that RDF is very similar to XML, but a closer analysis reveals that they
are conceptually different. If we model the information present in an RDF model
using XML, human readers would probably be able to infer the underlying semantic
structure, but general purpose applications would not.
While XML is being widely used across all travel industry segments, RDF is a
recent data model and its adoption is just starting in areas such as digital libraries,
Web services, and bioinformatics.
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