Subject: Re: [xsl] Help please: question on xml's schema and xslt From: "Wolfgang Laun wolfgang.laun@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Fri, 1 Aug 2014 13:12:49 -0000 |
On 01/08/2014, L2L 2L emanuelallen@xxxxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > I have ask on many different forums; visionzone, sitepoint, oreilly, even > ask an author of a book, but receive no reply. I have even try > stackexchange. This doesn't make sense.... > > ----question 2------- > > Is this legal: > > <?xml version="1.0" encoding="UTF-8"?> <xs:schema > xmlnss="http://www.w3.org/2001/XMLSchema"> <xs:annotation> > <xs:documentation> I'm warping a name simpleType name nameType in an element > that have the attribute type with the value of nameType. Is this legal; to > warp a name type as so: </xs:documentation> </xs:annotation> <xs:element > name="name" type="nameType"> <xs:simpleType name="nameType"> <xs:restriction > base="xs:string"> <xs:length value="25"/> </xs:restriction> </xs:simplyType> > </xs:element> </xs:schema> (Indendation is the politeness of list users.) No it is NOT - Element 'name' has both a 'type' attribute and a 'anonymous type' child. Only one of these is allowed for an element. Use this; <xs:element name="name" type="nameType"/> <xs:simpleType name="nameType"> <xs:restriction base="xs:string"> <xs:length value="25"/> </xs:restriction> </xs:simpleType> > -----question 3-------- > > What are extension and restriction type? Perhaps risk a short look on the XML Schema spec: http://www.w3.org/TR/xmlschema11-1/ [Definition:] A complex type definition which allows element or attribute content in addition to that allowed by another specified type definition is said to be an extension. [Definition:] A type defined with the same constraints as its 7base type definition7, or with more, is said to be a restriction. The added constraints might include narrowed ranges or reduced alternatives. Given two types A and B, if the definition of A is a 7restriction7 of the definition of B, then members of type A are always locally valid against type B as well. > > ----question 4--------- > > First question: (Actually the 4th.) > > Can I place an extension on a restriction type? > > And if so, how? Via what method? Directly? Via reference? Both? > > And if so for both, what other ways? > The excellent Primer on XML Schema http://www.w3.org/TR/xmlschema-0/ contains numerous examples for both. > Second question: (Actually it's the 5th.) > > targetNameSpace is to set a name space for the xml element in my schema? yes > or no then an explanation comment please. This isn't well formulated. If you mean "for the XML elements defined by <xs:element>" then the answer is: "yes, but not only for these, also for <xs:complextType>, <xs:simpleType> and other Schema components defined and named (!) in that XML schema. > > a xmlnssi="uri" is to set the prefix for the xsi namespace and a > xsi:noNamespaceSchemaLocation="uri" is to set the location of my schema? yes > or no, then a feedback comment please. You mean "xmlns:xsi=...". a) No, it defines the prefix "xsi" for the namespace uniquely identified by "uri". b) Yes, but only if you associate the prefix xsi to this URI: xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" > > is the targetNameSapce needed... I find it non-necessary to do when it > can(by what I'm reading) define top level element and complex type(another > question is that by definning type level complex type, do that also mean > that type level complex when use in a element that is nested in another > element gain the namespace too?). I find it unnecessary to use > targetNameSapce when it doesn't cover all element being defined in the > schema. No, you need not use targetNameSpace. You may run into difficulties if you try use different XML schema definitions without target namespaces but with conflicting definitions. -W > > informational feedback please anyone! > > > > E-S4L
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