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Re: [xsl] except (was: Keys with duplicates should be simple)
Subject: Re: [xsl] except (was: Keys with duplicates should be simple) From: Ihe Onwuka <ihe.onwuka@xxxxxxxxx> Date: Mon, 3 Feb 2014 08:43:43 +0000 |
On Mon, Feb 3, 2014 at 8:16 AM, Michael Kay <mike@xxxxxxxxxxxx> wrote: > > On 3 Feb 2014, at 07:18, Ihe Onwuka <ihe.onwuka@xxxxxxxxx> wrote: > >> If indeed except is equivalent to the set-theoretic difference >> operator would it be beyond the pale to admit difference into the >> syntax as a synonym for except. >> > > You haven't answered my post in which I attempted to show that the XPath usage of "except" was consistent with the natural language use of the term. > To me the natural language interpretation of except has the RHS of the except interpreted within the context of the LHS. If you are talking natural language - natural language interpretations don't allow for XPath abbreviations and if I read you rightly you are saying this would be natural if you allow for the effect of XPath abbreviations. > I think that using "difference" would confuse an awful lot of people who would assume, without reading the spec, that it meant magnitude difference (e.g. subtract, or date difference). > Well thats a problem of applying a mathematical construct outside of a mathematical domain, hence why I suggested the difference as alternative syntax to keep both sides happy (if indeed they are the same thing). I worked at an investment bank before going to university and never did A levels so I walked into my first Calculus class thinking that a derivative was a financial instrument and a slope was something you skied on. It is not feasible or desirable to go through life clinging on to these non-mathematical interpretations.
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