XSD：将属性添加到强类型“简单”分子 [英] XSD: Adding attributes to strongly-typed "simple" elements

问题描述

是否有一些明智的方法来使用强类型的简单类型和属性？元素有一个XSD模式，它有一个百万，百）元素可能如下所示：

 < xsd：element name =DocumentDescriptiontype =xsd：string /> 
< xsd：element name =DocumentDateTimetype =xsd：dateTime/> 
< xsd：element name =DocumentSizetype =xsd：int/> 
  

这是dandy。然而，我真的希望所有这些元素也有一些常见的属性，比如说，格式和是可视。即具有如下所示的模式：

 < DocumentDescription isVisible =true> doc description< / DocumentDescription> 
< DocumentDateTime format =dd / mm / yyyyisVisible =true> 1/1/2008< / DocumentDescription> 
< DocumentSize format =0.00 KBisVisible =false> 5403< / DocumentSize> 
  

我可以手动执行，可怕的是，当我生成它时，将所有这些属性添加到XSD ，如下所示：

 < xsd：element name =DocumentDescription/> 
< xsd：complexType> 
< xsd：simpleContent> 
< xsd：extension base =xsd：string> 
< xsd：attribute name =formattype =xsd：string/> 
< xsd：attribute name =isVisibletype =xsd：boolean/> 
< / xsd：extension> 
< / xsd：simpleContent> 
< / xsd：complexType> 
< xsd：element name =DocumentDateTime/> 
 ... etc 
  

...但在一个理想的世界，我宁愿定义它作为一个complexType：

 < xsd：complexType name =customType> 
< xsd：complexContent> 
< xsd：extension base =???> 
< xsd：attribute name =formattype =xsd：string/> 
< xsd：attribute name =isVisibletype =xsd：boolean/> 
  

...这意味着我可以做：

 < xsd：element name =DocumentDescriptiontype =customTypebaseType =xsd：string/> 
< xsd：element name =DocumentDateTimetype =customTypebaseType =xsd：dateTime/> 
< xsd：element name =DocumentSizetype =customTypebaseType =xsd：int/> 
  

我的理想世界代码的问题是：

a）我没有有效的< xsd：extension base - ???>，不在乎我在延伸什么我想扩展所有类型。似乎像xsd：anyType是适当的，然后元素成为弱类型的容器吗？

b）我可以不再在< xsd：element >上指定​​简单类型，因为现在该类型是我定义的复杂的customType。因此，我放在那里的虚构的baseType属性...

那么我可以以非笨重的方式为简单类型添加属性？或者我需要定义一个完全相同的complexTypes，除了它们扩展的简单类型？

强类型的元素不仅可以更明智地描述数据，而且当我使用它们在Excel中的XML映射（这是这些东西的全部目的）时，强类型意味着Excel会根据类型正确设置单元格格式。

我可能看着这一切都错了！任何建议赞赏。

解决方案

[quote]可以手动，可怕的是，
将所有这些属性添加到XSD
当我生成它，像
这样：[/ quote]

我恐怕这是你唯一的正确的XSD模式兼容的方式。

$ b $可以将XSD复制到作者，但有助于保持安全： - ）

Marc

Is there some sensible way to have elements with strongly-typed simple-types and also attributes?

Okay, I have an XSD schema which has a million (er, hundred) elements that might look like this:

<xsd:element name="DocumentDescription" type="xsd:string" />
<xsd:element name="DocumentDateTime" type="xsd:dateTime" />
<xsd:element name="DocumentSize" type="xsd:int" />

That's dandy. However, I really want all of these elements to also have some common attributes on them like, let's say, "format" and "isVisible". i.e. have a schema like:

<DocumentDescription isVisible="true">doc description</DocumentDescription>
<DocumentDateTime format="dd/mm/yyyy" isVisible="true">1/1/2008</DocumentDescription>
<DocumentSize format="0.00 KB" isVisible="false">5403</DocumentSize>

I could do it manually, and horribly, by adding all such attributes to the XSD when I generate it, something like this:

<xsd:element name="DocumentDescription" />
  <xsd:complexType>
    <xsd:simpleContent>
      <xsd:extension base="xsd:string">
        <xsd:attribute name="format" type="xsd:string" />
        <xsd:attribute name="isVisible" type="xsd:boolean" />
      </xsd:extension>
    </xsd:simpleContent>
  </xsd:complexType>
<xsd:element name="DocumentDateTime" />
   ... etc

...but in an ideal world I'd rather define it as a complexType:

<xsd:complexType name="customType">
  <xsd:complexContent>
    <xsd:extension base="???">
      <xsd:attribute name="format" type="xsd:string" />
      <xsd:attribute name="isVisible" type="xsd:boolean" />

...which means I could just do:

<xsd:element name="DocumentDescription" type="customType" baseType="xsd:string" />
<xsd:element name="DocumentDateTime" type="customType" baseType="xsd:dateTime" />
<xsd:element name="DocumentSize" type="customType" baseType="xsd:int" />

The problem with my "ideal world" code is that:

a) I've no valid <xsd:extension base-"???">, since really I don't care what I'm extending; I want to extend all types. Seems like the "xsd:anyType" is appropriate, yet then the element becomes a weakly typed container does it not?

b) I can no longer specify the simple type on the <xsd:element>, since now the type is the complex "customType" I defined. Hence the imaginary "baseType" attribute I put there...

So can I add attributes to simple types in a non-clunky way? Or do I need to define a dozen complexTypes that are all identical except for the simple type that they extend?

Strongly-typed elements not only describe the data more sensibly, but when I use them for XML mapping in Excel (and this is the whole purpose behind these things), the strong-typing means that Excel sets the cell formatting correctly based on the type.

I'm probably looking at it all the wrong way! Any advice appreciated.

解决方案

[quote]could do it manually, and horribly, by adding all such attributes to the XSD when I generate it, something like this:[/quote]

I'm afraid this is your only "proper", XSD-schema compatible way to do it.

XSD can be convoluted to author at times - but it helps keeping things safe :-)

Marc

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