Geohash is a service that turns geographic coordinates into hash values.
The Wikipedia article Geohash offers a useful summary of the project and why it is useful.
It makes me wonder what a hash service for degrees of social separation would look like?
A broader notion of the Social Register? How far separated are you from a convicted judge? Or an indicted securities lawyer?
Could be revised on a weekly basis based on the Sunday New York Times.
Prefix Hash Tree: An Indexing Data Structure over Distributed Hash Tables was posted by Alex Popescu over at myNoSQL.
Definitely one for the reading list, but, check out a copy at Citeseer: Prefix Hash Tree: An Indexing Data Structure over Distributed Hash Tables, has the advantage of citations, etc.
Freebase looks “lite” enough to actually be useful.
The problem of matching up the Freebase “unique” identifiers with the identifiers actually used by people in real communications remains.
Another problem is how to enable people work in a highly distributed fashion in terms of authoring matches between identifiers.
Are you using Freebase?
Comments?
“A Semantic Similarity Approach for Predicting Library of Congress Subject Headings for Social Tags,” by Kwan Yi, appears in JASIST, 61(8):1658-1672, 2010. This is an important article for library students to read. Carefully.
The author recognizes that linking social tags to controlled vocabularies may help with the organization of information that is only socially tagged. And the article is a good review of the application of five popular measures of semantic similarity metrics.
The interesting step for the article would be the reverse of the author’s suggested: “The study of introducing the LCSH to give a control to social tags…”(p. 1670).
Why not introduce “social tags” to enrich the finding experience of users in LCSH settings?
A substantial body of users find information with “social tags,” so why not offer that option?
The user experience with “social tags” along side LCSH headings in a library setting awaits future research.
xISBN (Web service) should be of interest to topic mappers.
From the website:
The xISBN Web service supplies ISBNs and other information associated with an individual intellectual work that is represented in WorldCat. Submit an ISBN to this service, and it returns a list of related ISBNs and selected metadata.
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ISBNs are related to each other in WorldCat using an algorithm developed by OCLC Research. The algorithm restructures WorldCat bibliographic records to conform to the FRBR conceptual model for information objects. For instance, rather than requiring an end user to traverse multiple records that represent many different manifestations of a book—including printings, hardback or paperback editions or even filmed versions—”FRBRized” WorldCat information allows that user to review a core record that lists all manifestations.
The xISBN Web service queries database tables in WorldCat created by the FRBR algorithm.
I got there from e-Book Finder, a nifty site build on top of xISBN, that tries to find electronic versions of books. Not necessarily free electronic versions, just electronic versions.
TMAPIX I/O 0.4.0 (snapshot) has been released by Lars Heuer.
From the announcement:
TMAPIX I/O provides readers for nearly all known Topic Maps syntaxes and supports RDF as well. Further it writes TM/XML, XTM 1.0, XTM 2.0, XTM 2.1, LTM 1.3 and JTM 1.0.
TMAPIX I/O is compatible to all Topic Maps engines which implement the TMAPI interfaces.
A few CTM-related “bugs” will be fixed before the official release of TMAPIX I/O 0.4.0 later this year. A bit formal to have official pre-1.0 releases. But, for Lars I will buy the party hats. 😉
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