SGML and XML are formal metalanguage facilities for defining markup languages. SGML has the full power to configure a set of features for markup languages, whereas XML has a fixed set of these SGML features. Since XML is a profile of SGML (rather like a p
This Thinking XML column shows how to combine metadata collected from multiple XML source documents into a single Resource Description Framework (RDF) model for effective querying. In this follow-up to his previous installment that introduced how to use X
FOAFCorp: Corporate Friends of Friends What is this? RDF is a great data format for describing interconnected entities. With FOAF, we have a simple fun vocabulary for describing social networks, people, organisations etc. The FOAFCorp experiment extends
Much as people and economies depend on information, the exchange of data has often been hindered by the incompatible formats of proprietary hardware and software. That was less of a problem when computers rarely communicated with each other, but now it's
Repeat after me: "There is no syntax." In order to use and gain advantage from RDF, you do not have to use any particular syntax -- not even the syntax specified in the RDF 1.0 specification. Uche Ogbuji discusses the importance of XML/RDF interchange, of
The motivation is to enable the common and consistent description of persons (using the existing semantics of vCard) and to encode these in RDF/XML. RDF is an application of the Extensible Markup Language XML.
The Resource Description Framework (RDF) is a W3C standard for describing Web resources, such as the title, author, modification date, content, and copyright information of a Web page. What is RDF? RDF stands for Resource Description Framework RDF is
<htmlCleaner> is open-source HTML parser written in Java. HTML found on Web is usually dirty, ill-formed and unsuitable for further processing. For any serious consumption of such documents, it is necessary to first clean up the mess and bring the order t
This is a language which is a compact and readable alternative to RDF's XML syntax, but also is extended to allow greater expressiveness. It has subsets, one of which is RDF 1.0 equivalent, and one of which is RDF plus a form of RDF rules.
Imagine a site that's a broker or mirror of metadata from other sites? You could go to this site, enter a URL and have the metadata from that page presented to you in clean, crisp XML. Even better if this was a Web service w/API free for anyone...quite a
FreePharma is a software plug-in that analyzes drug prescription information expressed in free natural language (written or spoken) and structures it automatically for integration in host applications. FreePharma can derive the dose, route, frequency etc.
There has been a lot of hype about the Semantic Web, and this has not been a good thing. Spurious claims about what the Semantic Web might and might not be able to do have been choking public understanding of it, and adding to the confusion that many peop