Thanks for all the background - I will see if I can cut and paste it to the wiki. Agreed - until someone needs to extend it we need not worry about the "dialects" thing - unless that person is called Andrea and the extension is to support FIDs :-)
Jody > Well, cql is defined in "OGC Cataloge Service Specification v1.1.1 and v > 2.0.0 " (OGC 02-087r3 y OGC 04-021r3) > > There are a "mandatory query language" what can be extended (optional > languages). > > In version 1.1.1 (OGC 02-087r3) present three types of query language: > > " .... > - A common, mandatory query language using SQL style syntax, Z39.50 Type 1 > operation style, and spatial operations derived from the simple features > model in the OGC Simple Features Implementation Specification. > > - Any dialect of SQL conformant with the OGC Simple Features Implementation > Specification. > > - Z.39.50 Type 1 query. > ..." > > other reference in v1.1.1 section 7.2.7.3.6 CG_QueryLanguage is > > "... > The list of query languages follows: OGC_Common, Z3950_TypeOne, > SQL3_SimpleFeature, SQL2_SimpleFeature > ..." > > We implement the first "mandatory query language", perhaps we need think > about > an interface what allows create instance of "dialects" different (we could > use that keywords in the factory method). I don't know if is important this > issue now, thinking that we only have one implementation. I only present the > problem for your knowledge. > > Cheers > > Mauricio > www.axios.es > > > On Tuesday 20 March 2007 17:25, Jody Garnett wrote: > >> I did not know it was version 2.0. >> >> By using "SPECIFICATION" we would get cql2_0 (I think the goal was to >> get gml2, gml3, filter1_0 into the package name where people could see it) >> > > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Geotools-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-devel
