Re: [xml-dev] MicroXSD meta-schema updated (2011 draft) Re: [xml-dev]Mic

[Stephen Green <stephengreenubl@gmail.com>]

Excellent. Thanks. I could make that 'all' a 'sequence' (seems to be the
convention, even though 'all', 'choice' and 'sequence' seem equally
bizarre and I reckon XSD should have had an proper alternative plus
a 'group' option that didn't require a global group).

This MicroXSD schema version's still just a draft of course. Interesting
to see just what can be done with W3C XML Schema in the MicroXML
scenario.

I think compact RNG notation could provide some interesting options
for MicroXML.
----
Stephen D Green



On 9 January 2011 22:52, John Cowan <cowan@mercury.ccil.org> wrote:
> Stephen Green scripsit:
>> New draft of a MicroXSD (v2011 draft 0.1) attached
>>
>> Maintaining this at http://www.stephengreenxml.org.uk
>
> I've translated this to RELAX NG compact notation, first by
> using xsconv to generate XSD compact notation (available at
> http://ccil.org/~cowan/xsconv-1.0.1.zip ), and then by hand conversion.
> The tool was slightly confused by the one-element <all> element, and
> Xerces doesn't seem to care for it either.
>
> default namespace = "http://www.w3.org/2001/XMLSchema";
>
> # version "MicroXSD-2011-draft-0-1"
>
> start = element schema {
>   attribute version {string}?,
>   attribute attributeFormDefault { "unqualified" },
>   attribute elementFormDefault { "unqualified" },
>   attribute targetNamespace {string},
>   element element {
>      attribute name { xsd:NCName },
>      (element complexType { complexType_type } |
>       element simpleType { simpleType_type })
>   }
> }
>
> element_type =
>   attribute name { xsd:NCName },
>   attribute minOccurs { "0" | "1" }?,
>   attribute maxOccurs { "1" | "unbounded" }?,
>   (element complexType { complexType_type }|
>    element simpleType { simpleType_type })
>
> base_type =
>  "string" | "decimal" | "integer" |
>  "date" | "dateTime" | "boolean" | "base64Binary"
>
> sequence_group =
>   element element {element_type} | complexType_subgroup1
>
> choice_group =
>   element element { element_type } | complexType_subgroup1
>
> restriction_type =
>   attribute base { base_type }
>
> complexType_type =
>   attribute mixed { "true" | "false" },
>   complexType_subgroup1?, complexType_subgroup2*
>
> simpleType_type =
>   element restriction { restriction_type }
>
> pattern_type =
>   attribute value { string }
>
> complexType_subgroup1 =
>   element sequence {
>      sequence_group+
>   } |
>   element choice {
>      choice_group+
>   }
>
> complexType_subgroup2 =
>   element attribute {
>      attribute use { "optional" | "required" }?,
>      attribute name { xsd:NCName },
>      element simpleType { simpleType_type }
>   }
>
> --
> John Cowan        http://ccil.org/~cowan   cowan@ccil.org
> Lope de Vega: "It wonders me I can speak at all.  Some caitiff rogue
> did rudely yerk me on the knob, wherefrom my wits yet wander."
> An Englishman: "Ay, belike a filchman to the nab'll leave you
> crank for a spell." --Harry Turtledove, Ruled Britannia
>