Real World XML (2nd Edition)

You use a Seq container to indicate that a property has multiple ordered values. In this case, you are indicating that the multiple property values have some order. For example, this document indicates that planet.html covers the topics Mercury, Venus, Earth and Mars, in that order:

Listing ch18_12.rdf

<?xml version="1.0" ?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://www.purl.org/DC#"> <rdf:Description about="http://www.starpowder.com/planets.html"> <dc:Title>Planets</dc:Title> <dc:Creator>Nicolas Copernicus</dc:Creator> <dc:Subject> <rdf:Seq> <rdf:li>Mercury</rdf:li> <rdf:li>Venus</rdf:li> <rdf:li>Earth</rdf:li> <rdf:li>Mars</rdf:li> </rdf:Seq> </dc:Subject> </rdf:Description> </rdf:RDF>