[jira] [Commented] (STANBOL-1034) Freebase owl:samAs processor

["Andrea Di Menna (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/STANBOL-1034?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13631586#comment-13631586 ] 

Andrea Di Menna commented on STANBOL-1034:
------------------------------------------

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

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira