- From: Andy Seaborne <andy.seaborne@epimorphics.com>
- Date: Sun, 05 Dec 2010 18:04:09 +0000
- To: Steve Harris <steve.harris@garlik.com>
- CC: SPARQL Working Group <public-rdf-dawg@w3.org>
On 05/12/10 15:47, Steve Harris wrote: >>> CONCAT(plain, anything) -> plain >>> >> CONCAT(string, string) -> string >> > >> > CONCAT(simple, anything) -> anything > But if CONCAT(plain, string) gives plain, you don't need that case, it falls out naturally as "simple" literals are a subset of plain. For me, it's whether the result follows the data or the query form and I'd rather it followed the data. Not following the form of the data seems to more inconsistent and inconvenient. CONCAT(?var1, " -> ", ?var2) where ?var1 and ?var2 are xsd:string -> xsd:string, simple -> simple plain+lang -> when same lang tag, plain+lang This allows people working with data using xsd:string to write unadorned " -> ", and mixed data, on different solutions, keeps the form of the solution where it can. If the app wants to pick a form, it can add a cast/STR/STRLANG. Forcing use of xsd:string means that the expression is forced by the form of the constant, not the type of ?var1/?var2. That can be achieved in the query by casting the result or using " -> "^^xsd:string Andy
Received on Sunday, 5 December 2010 18:04:46 UTC