Re: [xml-dev] Micro XSD for Micro XML?

[Stephen Green <stephengreenubl@gmail.com>]

I agree that people might want a non-XML syntax for
merely defining their Micro-markup but if there is going
to be any validation in the Micro-parser I'd reckon they
wouldn't want to go to the trouble of implementing two
syntaxes (they will just have implemented MicroXML)
- unless the schema syntax is incredibly simple or
exists already (like JSON perhaps :-)

I did some more rough work on a reduced 'XSD-like'
language (defined using its own schema language)
which could probably be mapped to XSD, to compact
relaxN, etc

<schema name="MicroSchema-draft" version="draft2">
	<element name="schema">
		<group>
			<element ref="element" maxOccurs="unbounded" />
			<element ref="group" maxOccurs="unbounded" >
		</group>
		<attribute name="name" type="string" />
		<attribute name="version" type="string" />
	</element>
	<element name="element">
		<group maxOccurs="unbounded">
			<element ref="element" />
			<element ref="group" />
		</group>
		<attribute name="ref" type="string" />
		<attribute name="name" type="string" />
		<attribute name="type" type="string">
			<!-- enumeration = string | integer | decimal | date | sequence -->
		</attribute>
	</element>
	<element name="attribute">
		<attribute name="ref" type="string" />
		<attribute name="name" type="string" />
		<attribute name="type" type="string">
			<!-- enumeration = string | integer | decimal | date | sequence -->
		</attribute>
	</element>
</schema>




----
Stephen D Green



On 17 December 2010 18:42, Costello, Roger L. <costello@mitre.org> wrote:
> Hi Folks,
>
> A validation language for Micro XML ... is XML syntax necessary for the validation language?
>
> To avoid bias, perhaps rather than "Micro XSD" the language should be referred to simply as a validation language for Micro XML, e.g., Micro VL.
>
> When is XML syntax needed and useful? When is a more compact syntax better?
>
> Presumably everyone on this list agrees that it is good to format data as XML when the data is to be queried and transformed.
>
> How often are validation documents (such as XML Schema documents) queried and transformed? No doubt it is done, but is that the 80% case or is it the exception to the rule?
>
> If it is the exception to the rule then that calls to question the need for an XML syntax for Micro VL.
>
> Many people enjoy Relax NG Compact. It has a non-XML syntax. Its history shows that it works fine as a validation language.
>
> Consideration of a compact, non-XML syntax for a Micro XML validation language seems prudent.
>
> /Roger
>
>
>
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