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Subject: Re: [relax-ng] Trang XSD output
> which allows neither attributes, child elements not child text nodes, and > thus that > > <xs:complexType mixed="true"/> > > allows just child text nodes and hence is equivalent to > > <text/> > > in RELAX NG. I may be wrong -- I often find I misunderstand XSD -- but both > MSXML and XSV seem to agree with me (the version of MSV I tried doesn't > though). It came to me last night (all of the sudden!) that maybe your interpretation is wrong. If you look at the complex type schema component, the {content type} property says it can be one of three: 1) empty 2) simple type 3) pair of content model and one of "mixed", "element-only" Thus as you see, "mixed" is applicable only when there's a content model. The concept of "mixed but no content model" can be still expressed by using an empty <sequence>, but I'm not sure if the spec says <complexType name="foo" mixed="true"/> will be implicitly transformed into: <complexType name="foo" mixed="true"> <complexContent> <restriction base="anyType"> <sequence/> And if you look at how the content type is parsed from XML (3.4.2), it says: 1 If the <restriction> alternative is chosen, then the appropriate case among the following: 1.1 If one of the following is true 1.1.1 There is no <group>, <all>, <choice> or <sequence> among the [children]; 1.1.2 There is an <all> or <sequence> among the [children] with no [children] of its own excluding <annotation>; 1.1.3 There is a <choice> among the [children] with no [children] of its own excluding <annotation> whose minOccurs [attribute] has the Eactual valueE 0; , then empty; So I guess if you take the spec at its face value, you'll get just "empty" without any mixed semantics. I'm not 100% certain but this seems like yet another gray area in the spec. regards, -- Kohsuke KAWAGUCHI Sun Microsystems kohsuke.kawaguchi@sun.com
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