Re: [xml] "double"s and schema validation

[Richard Quadling <rquadling gmail com>]

On 20 July 2010 02:40, Dan Sommers <dan tombstonezero net> wrote:
> Given this schema file, t.xsd:
>
> Â Â<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";>
> Â Â Â<xs:element name="t" type="xs:double"/>
> Â Â</xs:schema>
>
> And this xml document, t.xml:
>
> Â Â<t>e</t>
>
> I got this:
>
> Â Â$ xmllint --schema t.xsd t.xml
> Â Â<?xml version="1.0"?>
> Â Â<t>e</t>
> Â Ât.xml validates
>
> Note that <t>.</t> and <t>.e</t> also validate.
>
> I tracked it down to xmlschematypes.c, starting around line 2465, where
> it starts scanning the input for something suitable for sscanf("%lf").
> Should that code contain an extra check that there is at least one digit
> somewhere? ÂI think it comes down to the definition of "decimal" in the
> specÂ; the lexical representation arguably allows for such degenerates,
> although the canonical representation does not.
>
> So, is this a bug? ÂI couldn't find a bug or any previous discussion one
> way or the other. ÂIf it is a bug, is it in xmlschematypes.c or in the
> underlying sscanf implementations? ÂI get the same results at work
> (OpenSolaris) and at home (Debian).
>
> Regards,
> Dan
>
> Â http://www.w3.org/TR/xmlschema-2/#decimal

http://www.w3.org/TR/xmlschema-2/#double, not decimal.

As 'e' is an optional part of a double, can you try a different value.
Something like 'FooBar'. Anything really.