使用递归 XML 模式类型的问题
在一个 XML 模式中定义两个具有相同名称的元素（如 AnyType1 和 AnyType2 声明为 complexTypes 即可，它描述允许的子元素。然后，可以在一个上下文中将元素 AnyType1 和 AnyType2 都是递归的。要在 XSD 中定义递归类型，我使用以下语法
<xs:element name="any" type="AnyType1" />
<xs:complexType name="AnyType1">
<xs:choice minOccurs="1" maxOccurs="unbounded">
<!-- … some permitted subelements -->
<xs:element name="any" type="AnyType1" />
<!-- … some other permitted subelements -->
</xs:choice>
</xs:complexType>
此语法的缺点是我们必须在架构顶部声明元素 "any" 在架构顶部，我们可以'稍后不要使用 AnyType2 。
我的问题是：如何在同一命名空间的同一 XML 架构中声明两个递归元素类型。
我的问题的背景如下。我需要定义描述一些测试的 XML 模式。测试应结合
It is easy to define two elements with the same name like <any> in one XML schema and different permitted subelements. One should just declare two XSD types AnyType1 and AnyType2 as complexTypes which describes permitted subelements. Then one can declare element <any> in one context as <xs:element name="any" type="AnyType1" /> and as <xs:element name="any" type="AnyType2" /> in another context. My problem is that both AnyType1 and AnyType2 are recursive. To define a recursive type in XSD I use the following syntax
<xs:element name="any" type="AnyType1" />
<xs:complexType name="AnyType1">
<xs:choice minOccurs="1" maxOccurs="unbounded">
<!-- … some permitted subelements -->
<xs:element name="any" type="AnyType1" />
<!-- … some other permitted subelements -->
</xs:choice>
</xs:complexType>
Disadvantage of this syntax is that we have to declare the element "any" on the top of schema and we can’t use <xs:element name="any" type="AnyType2" /> later to define recursive type AnyType2 somewhere later.
My question is: how to declare two recursive element types in the same XML schema in the same namespace.
The background of my question is following. I need to define XML schema which describe some tests. The tests should be combined (grouped) with respect of <all> and <any> elements ("or" and "and" operations) to describes results of some tests. In one context (in one place of XML file) I need to allow one subset of tests which can be grouped by <all> and <any> and in another place other subelements should be permitted. So I don’t want to define <anyTest1> and <anyTest2> elements or <n1:any> and <n2:any>. I want just use <any>, but if <any> is subelement of <TestBeforeProgramStart> I want allow one subset of subelements and if <any> is subelement of <TestAfterProgramEnd> another subset.
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我自己找到了我的问题的答案。看起来很简单。
不需要在>，所以类型
AnyType1的声明可以紧随其后所以我描述的问题似乎并不真正存在。
I found the answer on my question myself. It seems very simple.
It is not need to declare
<xs:element name="any" type="AnyType1" />before<xs:complexType name="AnyType1">, so the declaration of the typeAnyType1can be just followingSo the problem which I described seems not really exist.