Andrew U. Frank kirjoitti 26.11.2017 klo 23:54:
when i use the sparql update protokoll to store data, am i not using
fuseki?
SPARQL the protocol (defined over HTTP) requires a server such as
Fuseki. SPARQL Update the language can be used also without a server,
for example with the command line tool tdbupdate.
I define my TDB in fuseki (in the run/configuration directory)
and i start a fuseki server which is the endpoint to receive the update
queries. i had the impression, that s-put is essentially doing wget to
the sparql endpoint.
Yes, s-put is roughly equivalent to wget or curl. It's a special purpose
HTTP client that knows about the SPARQL protocol so you can perform
slightly higher level operations. But you can do pretty much the same
things with wget or curl too.
is this (more or less) a correct understanding? how would one start the
TDB or TDB2 server without fuseki?
If you use the TDB/TDB2 command line tools you are not starting a
server. Instead they start a Java process that reads and possibly
manipulates the TDB database (directory full of files) while it is
running, then exits when it is done. Typically they perform a single
operation, for example tdbquery answers a single SPARQL query and
tdbupdate performs a single SPARQL Update operation. Compared to Fuseki
there is some startup overhead each time. However, sometimes the
operations are more efficient when performed via command line tools
instead of going through Fuseki, especially loading to TDB via tdbloader
and tdbloader2.
-Osma
--
Osma Suominen
D.Sc. (Tech), Information Systems Specialist
National Library of Finland
P.O. Box 26 (Kaikukatu 4)
00014 HELSINGIN YLIOPISTO
Tel. +358 50 3199529
[email protected]
http://www.nationallibrary.fi
