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https://issues.apache.org/jira/browse/STANBOL-1034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13631586#comment-13631586
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Andrea Di Menna commented on STANBOL-1034:
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Rupert, the DBpedia extraction framework is already providing links to Freebase
entities [1]
Also, I would suggest you take a look at [2] where the framework has been
updated to take into account wikipedia page ID for linking between DBpedia and
Freebase, since this offers a much more stable linking and it does not require
to cope with MQL escapes.
Note that in some cases MQL keys are escaped differently than what is suggested
in [3]
[1] http://downloads.dbpedia.org/3.8/links/freebase_links.nt.bz2
[2] https://github.com/dbpedia/extraction-framework/pull/27
[3] http://wiki.freebase.com/wiki/MQL_key_escaping
> Freebase owl:samAs processor
> ----------------------------
>
> Key: STANBOL-1034
> URL: https://issues.apache.org/jira/browse/STANBOL-1034
> Project: Stanbol
> Issue Type: Sub-task
> Components: Entityhub
> Reporter: Rupert Westenthaler
> Assignee: Rupert Westenthaler
>
> Freebase does not link any linked data set, but uses Freebase keys to
> represent IDs used for an Freebase entity within other data sets. However it
> does not support direct links to URIs of Entities in other datasets.
> In addition Freebase uses a special encoding for keys [1]. Therefore key
> values need
> This processor will include support for generating owl:sameAs links to
> DBPedia as well as Musicbrainz but may be extended to additional datasets in
> the future.
> DBPedia linking:
> -----
> Freebase does not link to DBPedia, but provides links to Wikipedia. But
> because DBPedia does use the same local names as Wikipedia this is not a
> problem. Freebase provides links to all Wikipedia languages. The mapping will
> prefer links to the English language version. Only for Entities where there
> is no link to the English version it will consider other language versions.
> Freebase often links several Wikipedia pages (of the same language) to a
> Freebase entity. Most often those versions are only redirected pages on
> Wikipedia. Because of that the linking will try to link only to the main
> page. This is determined by taking the name of the Freebase entity; replacing
> ' ' with '_' and looking if a key for that value exists. If this is not the
> case all links are included.
> Musicbrainz linking:
> ------
> Freebase provides musicbrainz.org IDs as keys. However to provide correct
> links based on those IDs one needs to also consider the type of the Entity as
> musicbrainz uses the types in for URIS - e.g.
> http://musicbrainz.org/recording/71158621-b261-4d3f-8b35-592014dc1fbb
> http://musicbrainz.org/release/f3c72169-6a7e-4594-a507-23360652f59c
> http://musicbrainz.org/artist/a4d486bd-6020-4a36-9c7d-bf5ce174bcd1
> The following mappings between Freebase types (rdf:type) and musicbrainz type
> names do exist
> recording => http://rdf.freebase.com/ns/music.recording
> artist => http://rdf.freebase.com/ns/music.artist
> release => http://rdf.freebase.com/ns/music.release
> Configuration:
> ----
> The configuration will allow to enable/disable the mappings for dbpedia and
> freebase
> [1] http://wiki.freebase.com/wiki/MQL_key_escaping
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