Re: Simple map and string-length(): unexpected behavio

Ah! To answer our question according to the w3c XML Schema on datatypes:
the difference is that the zero-argument version of string-length() used in
the simple map operation casts the item to string() before taking its
string-length. When this happens, the lexical form is defined in a
canonicalized way (so that's why 005 gets measured as "5" with a
string-length of 1.

We are further enlightened. :-)
Elisa

On Fri, Jun 7, 2019 at 5:52 PM Elisa Beshero-Bondar ebbondar@xxxxxxxxx <
xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> Dear XSL list,
>
> We are perplexed by a discrepancy between applying the string-length()
> function directly to a numerical argument and using simple map to perform
> what we expected would be the same operation. string-length(5) returns an
> error, as expected. oXygen reports: "XPath failed due to: Required item
> type of first argument of fn:string-length() is xs:string; supplied
> expression (5) has item type xs:integer". eXist-db reports: "xs-integer(5)
> is not a sub-type of xs-string".
>
> When we use simple map, though, the behavior is different:
>
> 5 ! string-length() returns a string-length of 1
>
> 05 ! string-length() returns a string-length of 2
>
> 0.5 ! string-length() returns a string-length of 3
>
> 00.5 ! string-length returns a string-length of 3
>
> 05 ! string-length() returns a string-length of 1
>
> Can someone please explain why simple-map does not raise the type error
> that we see when we write the numerical argument directly inside the
> function parentheses?
>
> Thanks for your help!
> Elisa
> --
> Elisa Beshero-Bondar, PhD
> Associate Professor of English
> University of Pittsburgh at Greensburg
> Humanities Division
> 150 Finoli Drive
> Greensburg, PA  15601  USA
> E-mail: ebb8@xxxxxxxx
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-- 
Elisa Beshero-Bondar, PhD
Director, Center for the Digital Text | Associate Professor of English
University of Pittsburgh at Greensburg | Humanities Division
150 Finoli Drive
Greensburg, PA  15601  USA
E-mail: ebb8@xxxxxxxx <ebb8@xxxxxxxx>
Development site: http://newtfire.org