Dear Workgroup, All,
Maybe not the best moment to bring this up as the ink on SPARQL 1.1 is
not even dry yet. But looking to the future could we start thinking
about SPARQL 1.2 and what could be standardized there.
The first need I am seeing is the need to standardize query hints.
Oracle uses extra prefix declarations for query hints [1].
BigData uses magic BGP's [2]
Virtuoso introduced a new keyword ASSUME [3]
The BigData and Virtuoso approach introduce query incompatibilities
which is unfortunate. Oracle is ok in this respect as the unused
prefixes won't affect any strictly compatible sparql engine. I like the
idea that any SPARQL query will run on any store the only thing changing
is speed. Extra keywords or non existing BGP's break this utopia :(
The second is an expansion of the basic math operators to include at
least (square)root. (square)root is very hard to implement using the
current SPARQL constructs yet is a very useful function. (even if not exact)
Regards,
Jerven
[1]
http://docs.oracle.com/cd/E18283_01/appdev.112/e11828/sem_jena.htm#CBBIAGAF
[2] http://sourceforge.net/apps/mediawiki/bigdata/index.php?title=QueryHints
[3]
http://sourceforge.net/mailarchive/forum.php?thread_name=51F67BB8.7030302%40openlinksw.com&forum_name=virtuoso-users
--
-------------------------------------------------------------------
Jerven Bolleman [email protected]
SIB Swiss Institute of Bioinformatics Tel: +41 (0)22 379 58 85
CMU, rue Michel Servet 1 Fax: +41 (0)22 379 58 58
1211 Geneve 4,
Switzerland www.isb-sib.ch - www.uniprot.org
Follow us at https://twitter.com/#!/uniprot
-------------------------------------------------------------------
