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Re: [xsl] Usage of Asterisk in XPath expressions

2019-03-22 17:27:52
<xsl:attribute name=“select:select” 
     select=“let $select:select := 
select:select($select,select:select[@select:select]) 
return $select:select(‘select:select')/select:select/@select:select”/>

etc..... is I think, legitimate.....

Sent from my iPad

On 22 Mar 2019, at 21:52, Wendell Piez wapiez(_at_)wendellpiez(_dot_)com 
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:

Liam,

Inevitably your observation about axis specifiers raises a larger
question about fun namespace prefixes:

'element'
'attribute'
'node'
'select'

... are there others we should be especially careful about?

Cheers, Wendell

On Fri, Mar 22, 2019 at 4:12 PM Liam R. E. Quin 
liam(_at_)fromoldbooks(_dot_)org
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:

On Fri, 2019-03-22 at 13:33 +0000, Martin Honnen 
martin(_dot_)honnen(_at_)gmx(_dot_)de
wrote:
[...]
However, the other main reason that doesn't raise an error is that
ancestor-or-self::foo evaluates to the empty sequence in the context
of that document and that way the multiplication also evaluates to
the empty sequence.

Yup, You're a star! :D

As Mike Kay points out separately, it’s a problem when a language gets
so terse that almost any string of puctuation has a meaning.

With regular expressions i tend to write [(] and [)] because i can
never remember in which sytaxes \(...\) is special, same with [{]
braces [}]. There can be an efficiency overhead for doing this, but
there’s a bigger efficiency overhead in time lost from a confused
developer :)

Similarly, avoid using XPath axis names as namespace prefixes :-) :-)

Liam


--
Liam Quin, https://www.delightfulcomputing.com/
Available for XML/Document/Information Architecture/XSLT/
XSL/XQuery/Web/Text Processing/A11Y training, work & consulting.
Web slave for vintage clipart http://www.fromoldbooks.org/



-- 
Wendell Piez | wendellpiez.com | wendell -at- nist -dot- gov
pellucidliterature.org | github.com/wendellpiez |
gitlab.coko.foundation/wendell  - pausepress.org

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