Subject: Re: [xsl] things about grouping From: Andrew Welch <andrew.j.welch@xxxxxxxxx> Date: Wed, 28 Nov 2012 10:41:42 +0000 |
> If you are going to support an operator called except then it's > semantics should be that such that it takes it's context from it's > left hand side One way to think about this is to visualise the tree of nodes in your head - visualise the whole input tree. Then visualise the nodes selected by the LHS glowing one colour, and the nodes selected by the RHS glowing in a different colour. It should then be easier to visualize those nodes selected by the LHS except those nodes also selected by the RHS, and also help with seeing the RHS selection being independent of the LHS. That might help, or it might be nonsense... (aka ymmv) but the ability to visualise the tree of nodes is key. -- Andrew Welch http://andrewjwelch.com
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