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3.2. METADATA APPLICATIONS 37<br />

Figure 3.2: User modeling server according to [Fink, 2004]<br />

3.2 Metadata Applications<br />

In this section we present the Dublin Core Metadata Initiative, the Customer Profile Exchange,<br />

the Human Markup Language and the Composite Capabilities/Preference Profile.<br />

The discussion and comparison will follow in section 3.4.<br />

3.2.1 Dublin Core Metadata<br />

The Dublin Core 9 , see [Manola and Miller, 2004], is a set of metadata elements for describing<br />

documents. The term metadata refers to data used to identify, describe or locate information<br />

resources. While structured metadata processed by computers is relatively new, the<br />

basic concept of metadata has been used for many years in helping manage and use large<br />

collections of information. The element set was originally developed at the Metadata Workshop<br />

in Dublin, Ohio in 1995. The Dublin Core has subsequently been modified on further<br />

workshops. The goal of the Dublin Core is to provide a minimal set of descriptive elements<br />

that facilitate the automated indexing and description of document-like network objects, in a<br />

manner similar to a library card catalog. In addition, the Dublin Core is meant to be sufficiently<br />

simple to be understood and used by the wide range of others and casual publishers<br />

who contribute information to the internet. Dublin Core elements are nowadays widely used<br />

in documenting internet resources. The Dublin Core Metadata Element Set contains definitions<br />

for the following properties:<br />

9 Dublin Core homepage: http://dublincore.org/documents/dces/

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