Re: Brain Teaser: Element Author is of type xsd:string, what's

From: Brendan <melbourne.research@g...>
To: "Costello, Roger L." <costello@m...>, xml-dev@l...
Date: Sat, 10 Feb 2007 06:22:50 +1100

Play the video

Hi Roger,

Ah, I see now that it's not valid with respect to the schema.
ie. the problem with <tag/> is not that it's an illegal string, but that it's not a string at all.

<xsd:element name="Author" type="xsd:string" />

<Author> <tag/> </Author>

> However, that's not the same thing as giving Author a non-string value.
Being pedantic, I guess <tag/> is a "non-string" value.

PS: I think you meant "not valid", instead of "non-well-formed" - I always get those two confused, and had to look it up.

Brendan

On 10/02/07, Costello, Roger L. <costello@m...> wrote:

Hi Brendan,

I think that's an example of <Author> having non-well-formed content, not an example of <Author> having an illegal string value. Certainly if the "<" is escaped then <Author> is legal:

    <Author> <tag/> </Author>

I'm not sure what the answer is.

/Roger

From: Brendan [mailto:melbourne.research@g...]
Sent: Friday, February 09, 2007 1:29 PM
To: Costello, Roger L.
Subject: Re: Brain Teaser: Element Author is of type xsd:string, what's an illegal value of Author?

What about
   <Author> <tag/> </Author>
Isn't an element a non-string value, and therefore illegal?

Brendan Macmillan

<xsd:element name="Author" type="xsd:string" />

<?xml version="1.0"?>
<Book>
        <Author>...</Author>
</Book>

Question: what is an invalid (non-string) value for <Author>?

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