Changes between Version 7 and Version 8 of CMD2RDF/sysarch

Timestamp:

09/08/14 10:12:12 (10 years ago)

Author:

Menzo Windhouwer

Comment:

--

CMD2RDF/sysarch

@@ -131 +131 @@
 }}}
 
+== CMD-RDF
+
+Instead of exposing Virtuoso directly the CMD-RDF is the main access point to the Virtuoso triple store. This servlet should provide or support the following interfaces:
+
+* a SPARQL endpoint
+* a REST API
+* if needed a browser UI, but a generic UI might be based on the SPARQL endpoint
+* an admin interface to see how CMD2RDF is behaving
+
+=== SPARQL endpoint
+
+Should in principle follow the [http://www.w3.org/TR/2013/REC-sparql11-protocol-20130321/#query-operation query operation part of the SPARQL 1.1 protocol]. This might be limited by what Virtuoso actually [http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VOSSparqlProtocol supports], but the servlet layer might be able to amend some shortcomings. To prevent burdening the server to heavily the SPARQL endpoint should be limited in the following ways:
+
+* only queries should be allowed, i.e., no updates
+* queries should be limited in their running time, e.g., a minute (?)
+* only a limited number of concurrent queries are allowed
+
+All or some of these limits might already be supported by Virtuoso.
+
+=== REST API
+
+Each CMD record corresponds to a single graph which has an unique URI, e.g., https://catalog.clarin.eu/cmd/rdf/TLA/MPI123. It should become possible to access these graphs by just resolving these URIs. This can be a simple wrapper around [http://virtuoso.openlinksw.com/dataspace/doc/dav/wiki/Main/VirtGraphUpdateProtocol Virtuosos support] for [http://www.w3.org/TR/2013/REC-sparql11-http-rdf-update-20130321/ SPARQL 1.1 Graph Store HTTP Protocol], where again only GETs should be supported.
+
+Additionally it should become possible to retrieve sets of graphs, e.g., https://catalog.clarin.eu/cmd/rdf/TLA to get all the graphs of TLA CMD records. The return could be one big [http://www.w3.org/TR/trig/ TriG] document or, probably more convenient, a ZIP file containing the RDF representations of the records.
+
+=== Browser
+
+Preferably expose a generic browser, e.g., [https://code.google.com/p/elda/ Elda].
+
+=== Admin
+
+Administrators should be able to see the status of CMD2RDF, e.g., how many graphs are stored in Virtuoso, access statistics, conversion statistics, process info.
+
+Access to the admin console can be restricted to a configured set of Shibboleth principals.
+
 == Questions, Issues, Discussion