[Eulergui-user] new FEATUREs : SPARQL, table views, and Jena TDB

[Jean-Marc V. <jea...@gm...>]

Happy new year all semantic guys and girls !


We worked on SPARQL, table views, and Jena TDB triple store.

First, a bug on Windows prevented SPARQL queries to work in recent snapshots.

In table view, for an URI (that is, an RDF resource), a cell value is
a button that adds the URI to current project.
It has an effect identical to the right click contextual command in N3
editor "eulergui-add-uri-to-project" .
It adds the URI to current project (and then from the main window the
N3 text, the table view, or the graph view can be viewed).
It makes sense for Browsable graphs servers like dpdepia, or for
ontology URI's .

In SPARQL SELECT table, the displayed table is updated in place when
the SPARQL source or end-point changes. Before that, the user was
obliged to push again on table button.
The values are now typed, so sorting on numeric column works. Datatype
is shown as a tooltip in table header.

A SPARQL "service" URI starting with file:/ is now interpreted as a
TDB directory for Jena TDB triple store. So one can query a local
database as easily as a remote HTTP endpoint. Note that there is an
internal TDB directory at
$HOME/.eulergui/TDBDatabases/Dataset1
that can be used, but this directory is not refered to in the GUI at the moment.

A snapshot for revision 3413 is at the usual place :
http://eulergui.sourceforge.net/maven2/eulergui/eulergui/1.13-SNAPSHOT/?C=M;O=D

Enjoy !

-- 
Jean-Marc Vanel
Déductions SARL - Consulting, services, training,
Rule-based programming, Semantic Web
http://deductions-software.com/
+33 (0)6 89 16 29 52
Twitter: @jmvanel ; chat: irc://irc.freenode.net#eulergui