Re: good references re. ontologies for S*m*ntic W*b
> Not to reignite negative passions in this esteemed forum or
> anything, but I'm currently putting together a survey article
> examining the current state of research/development re. ontologies
> for the semantic web and was just wondering if anyone here would
> like to nominate what they see as the most insightful thing(s)
> they've seen written on the topic lately.
This isn't, I suspect, what you are asking about, but you
might take a look at data we've collected with Swoogle
(http://swoogle.umbc.edu). This gives a snapshot of what
semantic web ontologies (in RDF, RDFS, or OWL) are out there
and how they are being used.
Swoogle query, [1] for example, finds 27 ontologies that
define terms with local names including 'time' 'before' and
'event'. We judge an RDF document to be an ontology if a
significant number of its triples are involved in defining
terms (e.g., it's mostly T-Boxy). These are ranked using a
pageRank like algorithm modified for semantic web documents.
Query [2] shows 763 class terms that have been defined whose
local name includes the lexeme 'person'. These results are
ranked by how frequently the classes have been instantiated.
Query [3] finds 114 properties whose local names include any
of the lexemes in {salary, pay, wage, wages, payment}.
These are ranked by how often each has been used to assert
values.
Web page [4] has various simple statistics and reports,
including a ranking of the 500 most used namespaces [5],
classes [6] and properties [7].
Swoogle confirms that the simple FOAF vocabulary is getting
a lot of use. We've crawled over 1.5 million foaf documents
(most of which are not in Swoogle's database) and there are
many more out there. We've keep most of the blog generated
foaf files out of Swoogle's database, since they are
relatively less interesting from semantic web view. [9]
describes some of what we found while studying foaf
documents. (A sample data set of foaf documents is
available in [11]).
Some papers on Swoogle are [8], [9] and [10].
[1] http://swoogle.umbc.edu/modules.php?searchString=time+before+event&start=1&total=-1&searchParam=&submitted=Swoogle+Search&name=Swoogle_Search&file=searchDB&searchType=1
[2] http://swoogle.umbc.edu/modules.php?searchString=person&start=1&total=-1&searchParam=&submitted=Swoogle+Search&name=Swoogle_Search&file=termSearch&searchClass=1
[3] http://swoogle.umbc.edu/modules.php?searchString=salary+%5Cor++pay+%5Cor+wage+or+%5Cwages+%5Cor+payment&start=1&total=-1&searchParam=&submitted=Swoogle+Search&name=Swoogle_Search&file=termSearch&searchProperty=1
[4] http://swoogle.umbc.edu/modules.php?name=Swoogle_Statistics
[5] http://swoogle.umbc.edu/modules.php?name=Swoogle_Statistics&file=usage_namespace
[6] http://swoogle.umbc.edu/modules.php?name=Swoogle_Statistics&file=usage_class
[7] http://swoogle.umbc.edu/modules.php?name=Swoogle_Statistics&file=usage_property
[8] http://ebiquity.umbc.edu/v2.1/paper/html/id/183/
[9] http://ebiquity.umbc.edu/v2.1/paper/html/id/184/
[10] http://ebiquity.umbc.edu/v2.1/paper/html/id/202/ (draft)
[11] http://ebiquity.umbc.edu/v2.1/resource/html/id/82/
--
Tim Finin, Prof Computer Science & Elect Eng, Univ of Maryland,
Baltimore County, 1000 Hilltop Circle, Baltimore MD 21250.
+1-410-455-3522 fax:-3969 finin@umbc.edu http://umbc.edu/~finin/