Re: ANN: datos.bne.es, the new Linked Data service from the National Library of Spain

El 03/12/14 12:40, Richard Light escribió:
>
> On 03/12/2014 11:19, Daniel Vila Suero wrote:
>> Dear Richard,
>>
>> Thank you very much for the very quick feedback :-)
>>
>> El 03/12/14 11:56, Richard Light escribió:
>>> Hi,
>>>
>>> When I try to dereference a work:
>>>
>>> http://datos.bne.es/edicion/Mimo0000379726
>>>
>>> it does the correct 303 redirects based on content type, but I get 
>>> an empty result for both Turtle and RDF/XML.
>>>
>>> For authors:
>>>
>>> http://datos.bne.es/autor/XX1000054
>>>
>>> there is some data, but it contains no links to the author's works, 
>>> so it isn't very "Linked Data". 
>>
>> There is problably some mismatch between the data feeding the content 
>> negotiation and the data feeding the portal due to the recent updates 
>> we made, we will look more in detail into this. It is not an issue of 
>> not being linked data, if we have links presents will give them back 
>> to you in both views HTML and RDF flavours as in: 
>> http://datos.bne.es/autor/XX1020842.ttl and 
>> http://datos.bne.es/autor/XX1020842.html
> Ah, so you can do it for Shakespeare, but not for me. :-) My HTML (see 
> above) has a link to the work Museum Documentation Systems, but the 
> Turtle doesn't.

:-) We will work to bring your links up to date! At least, we hope it 
was easy to find yourself in datos.bne.es :-)
>
>>> Also, there seems to be some confusion in the URL pattern: the 
>>> subject URL within the RDF is 
>>> http://datos.bne.es/resource/XX1000054, i.e. "resource" replaces 
>>> "autor".
>> We have kept the canonical URIs for things that we published in 
>> previous versions: http://datos.bne.es/resource/ which correspond to 
>> non-information resources and use the 303 mechanism to provide 
>> different representations, in this case changing to a typed URI 
>> pattern + the file extension, this was motivated to support nicer 
>> URIs for the human-oriented content of the portal and its similar to 
>> patterns like the one used in DBpedia where they do /resource/ --> 
>> /page/ or /resource/ --> /data/ + the file extension for RDF 
>> representations.
> Having recently finished "Linked Data for Libraries, Archives and 
> Museums" (van Hooland and Verborgh), I am newly enthused about the 
> application of a proper REST approach.  To conform to this, I think, 
> the URLs quoted when a resource is dereferenced should be compatible 
> with the URL itself.  Otherwise, won't machine agents attempting to 
> use these URLs to navigate become confused?
My understanding is that an agent should only use the Location to 
retrieve more data (a representation of a resource). Given a canonical 
URI to name the entity (http://datos.bne.es/resource/XX1000054), an 
agent can try to dereference it, asking for a concrete representation 
that he understands (e.g., turtle) and what it gets back is a LOCATION 
with a Turtle representation of the entity in question, that it's 
described in terms of canonical URIs (e.g., 
http://datos.bne.es/resource/XX1000054 a frbr:Person; rdfs:label 
"Richard"). The agent then can follow his nose using these URIs to 
retrieve more data (in the RDF representations we only use canonical 
URIs not Locations).

We have tried to follow existing best practices (ISA guidelines [1] 
mention for example the pattern /id/ --> /doc/), but we are open to 
suggestions from the community on how to improve content-negotiation 
mechanisms because our goal is to make the data useful for application 
developers.

Best wishes

Daniel

[1] 
https://joinup.ec.europa.eu/sites/default/files/D7.1.3%20-%20Study%20on%20persistent%20URIs_0.pdf
>
> Richard
>
>>
>> Thank you very much for your comments, they help us to improve the 
>> service.
>>
>> Daniel
>>>
>>> Richard
>>>
>>> On 03/12/2014 10:11, Daniel Vila Suero wrote:
>>>> The *National Library of Spain* (BNE) (www.bne.es 
>>>> <http://www.bne.es>) and the *Ontology Engineering Group* 
>>>> (www.oeg-upm.net <http://www.oeg-upm.net>) are glad to announce the 
>>>> new *datos.bne.es <http://datos.bne.es> 
>>>> (http://datos.bne.es)* Linked Data service (in Spanish).
>>>>
>>>> This new service represents a milestone of the Linked Data project 
>>>> started by the end of 2011 and that already published*Linked Open 
>>>> Data under a Public Domain license* (Creative Commons CC0). We have 
>>>> been working to improve many aspects of the service and would like 
>>>> to share with you some *key features*:
>>>>
>>>> *A new way to search, discover and explore*
>>>> *-------------------------------------------------------------*
>>>>
>>>> The new (beta) portal exploits linked data *to create better 
>>>> experiences for the user*. A graph with millions of new connections 
>>>> allows the user to explore the collections comprehensively and 
>>>> across three core entities: authors, works and topics. The search 
>>>> engine (e.g., http://datos.bne.es/find?s=joyce 
>>>> <http://datos.bne.es/find?s=joyce>) also uses this graph to 
>>>> retrieve and rank entities, presenting relevant information to the 
>>>> user and allowing for simple, easy-to-use faceting.
>>>>
>>>> Besides, we continue to offer a public SPARQL endpoint 
>>>> (http://datos.bne.es/sparql) for people to query and use the data 
>>>> for their own applications, content negotiation, and we also 
>>>> provide schema.org <http://schema.org> descriptions of authors and 
>>>> works using JSON-LD.
>>>>
>>>> *More data, more links*
>>>> *-------------------------------*
>>>>
>>>> We have published the full catalogue comprising *more than 9 
>>>> million records and around 150.000 digitalized materials* that 
>>>> generate more than 140 million RDF triples. These linked data 
>>>> resources describe and give access to authors, organizations, 
>>>> topics, modern and ancient books, photographs, cartographic 
>>>> materials, drawings, manuscripts, or printed and manuscript music.
>>>>
>>>> We provide around *1.4 million sameAs links* and add links to new 
>>>> datasets such as ISNI, data.bnf.fr <http://data.bnf.fr>, id.loc.gov 
>>>> <http://id.loc.gov>, and geo.linkeddata.es 
>>>> <http://geo.linkeddata.es>. More importantly, we have significantly 
>>>> increased the internal links between authors, bibliographic 
>>>> resources and digital materials.
>>>>
>>>> *The BNE data model*
>>>> *-----------------------------*
>>>>
>>>> The BNE vocabulary, inspired by the FRBR data model, reuses and 
>>>> integrates several vocabularies such as IFLA FRBR, ISBD, or RDA, 
>>>> among others. The vocabulary is available for both humans and 
>>>> machines at http://datos.bne.es/def/, it is documented in English 
>>>> and Spanish. We will soon provide alignments to the aforementioned 
>>>> vocabularies.
>>>>
>>>> *Help us to improve*
>>>> *---------------------------*
>>>>
>>>> We would very much appreciate receiving feedback from the 
>>>> community. If you have any ideas/comments on how to improve the 
>>>> service, you encounter issues/problems, you want to collaborate, 
>>>> etc. please get in touch. But first of all, we invite you to visit:
>>>>
>>>> http://datos.bne.es
>>>>
>>>> Thanks and our best wishes.
>>>>
>>>> Daniel Vila Suero, Asunción Gómez Pérez, Ricardo Santos and Ana 
>>>> Manchado, on behalf of the OEG and BNE teams.
>>>
>>> -- 
>>> *Richard Light*
>>
>
> -- 
> *Richard Light*