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Swoogle Manual

How to Search Semantic Web Terms

Swoogle lets user-agents search for Semantic Web Terms, i.e. URIs of classes or properties defined in the Semantic Web.  There is one queryType currently available:

  • search_swt: search all semantic web terms

Composing a search string

By default, Swoogle allow users to specify an arbitrary search string to find relevant semantic web terms. In stead of indexing the URI of a term, Swoogle searches additional information: the URI of the term, the namespace and local-name, and the description collected from its definitions distributed in many ontologies.

foodweb search terms which are relevant to "foodweb"

Advanced Search using field constraints

Swoogle also allow user agents to specify finer constraints over the following fields of a semantic web term T:

  • uri: the URI of T.   e.g. "http://xmlns.com/foaf/0.1/Person"
  • desc: the description of T,  obtained from definitions of T from all ontologies defining it. e.g. "A person"
  • ns: the namespace  used by T. e.g. "http://xmlns.com/foaf/0.1/"
  • localname: the local-name used by T. e.g.  "Person"
  • label:  the lexeme of T's local-name. e.g.  'SeaFood' has two labels: 'sea' and 'food'
  • type: the type (either class  or property) of this.  e.g. "owl.class"
uri:food search terms having "food" as part of their URLs
ns:food search terms having "food" as part of their namespace
ns:"http://xmlns.com/foaf/0.1/" search terms having "http://xmlns.com/foaf/0.1/" as their namespace
localname:food search terms having "food" as their local-name (exact match)
label:food search terms having "food" as the lexeme of their local-name
desc:food search terms having "food" as part of their definitional description
type:owl.class search terms which are defined as instance of owl:Class

Advanced Search using Lucene features

This search service is powered by Lucene, so the user-agents can also directly use Lucene query syntaxes. Below are some commonly used features:

food    web search terms relevant to "food' and "web". By default, two search keywords are connected by AND  semantics.
food OR web search terms  relevant to either "food' or "web". OR must be written in all capitalized. 

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