- From: Steve Harris <steve.harris@garlik.com>
- Date: Wed, 3 Nov 2010 11:06:22 +0000
- To: Andy Seaborne <andy.seaborne@epimorphics.com>
- Cc: Lee Feigenbaum <lee@thefigtrees.net>, SPARQL Working Group <public-rdf-dawg@w3.org>
On 2010-11-03, at 10:23, Andy Seaborne wrote: > Fine tuning. > > fn:concat > > http://www.w3.org/TR/xpath-functions/#func-concat > > [[ > The fn:concat function is specified to allow an two or more arguments that are concatenated together. This is the only function specified in this document that allows a variable number of arguments. This capability is retained for compatibility with [XML Path Language (XPath) Version 1.0]. > ]] > > As Steve pointed out, fn:concat casts to string (and empty sequences go to empty string) but also it's the only function in F&O that takes a variable number of arguments; others take sequences e.g. fn:string-join. > > If we wish to be more conservative, we could provide own binary string concatenation operation (tighter signature, can devolves to fn:concat for the functionality). OK, but I think we should also expose a CONCAT() function that's fn:concat underneath. The variadic nature is useful, as is the implicit cast to xsd:string. - Steve -- Steve Harris, CTO, Garlik Limited 1-3 Halford Road, Richmond, TW10 6AW, UK +44 20 8439 8203 http://www.garlik.com/ Registered in England and Wales 535 7233 VAT # 849 0517 11 Registered office: Thames House, Portsmouth Road, Esher, Surrey, KT10 9AD
Received on Wednesday, 3 November 2010 11:06:56 UTC