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Re: XPath expression which checks that all commas are escaped

  • From: yamahito <yamahito@gmail.com>
  • To: "Costello, Roger L." <costello@mitre.org>
  • Date: Mon, 06 Nov 2017 17:10:47 +0000

Re:  XPath expression which checks that all commas are escaped
You could also use an ebnf grammar with something like the rex parser in your schematron rule: see e.g. Kirk a’s paper from XML London this year*, or some of Stephen Pemberton’s talks that it references

* video: https://m.youtube.com/watch?v=0hhquUmsKf0
paper: p56 of http://xmllondon.com/2017/xmllondon-2017-proceedings.pdf

On Fri, 3 Nov 2017 at 9:10 pm, Costello, Roger L. <costello@mitre.org> wrote:
Michael Kay wrote:

> I suspect that there must only be one
> backslash before the comma: if there
> are two ("\\,") then the comma is not
> escaped because the "\\" represents
> a real backslash.


I had not thought about that.

> not(matches(replace(., '\\\\', ''), '^,|[^\\],'))




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