xml 在哪里向 XSD 架构添加版本？
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Where to add a version to an XSD schema?
提问by elifiner
The application I work on has XML output that conforms to an XSD schema. As features are added to the application, the XSD changes and I would like to note the version of the schema in the XSD file.
我处理的应用程序具有符合 XSD 架构的 XML 输出。随着功能添加到应用程序中，XSD 发生了变化，我想注意 XSD 文件中架构的版本。
Perhaps I'm missing something, but I haven't found a built-in way to mark the version of the schema.
也许我遗漏了一些东西，但我还没有找到标记模式版本的内置方法。
How do you do it?
你怎么做呢？
回答by peter_raven
You can use the namespace of your xsd document
您可以使用 xsd 文档的命名空间
<xs:schema targetNamespace="http://yourcompany/yourapp/1.0" ... >
...
</xs:schema>
As an example look at the xsd's defined by w3.org, this is how they do it. Do note that changingthe version number here would usually by definition be a breaking change for any consumers of your xsd (no matter how small the actual change was, or which part of the version number you changed).
以 w3.org 定义的 xsd 为例，他们就是这样做的。请注意，根据定义，更改此处的版本号通常对您的 xsd 的任何使用者来说都是一个重大更改（无论实际更改有多小，或者您更改了版本号的哪一部分）。
For less impacting versioning, there seems to be an agreement about putting a version attribute at your root element:
为了减少版本控制的影响，似乎有一个关于在根元素中放置版本属性的协议：
<xs:schema version="1.0.0" ...>
...
</xs:schema>
回答by Roland Bouman
According to the schemaelement itself has a versionattribute:
根据schema元素本身有一个version属性：
<schema
attributeFormDefault = (qualified | unqualified) : unqualified
blockDefault = (#all | List of (extension | restriction | substitution)) : ''
elementFormDefault = (qualified | unqualified) : unqualified
finalDefault = (#all | List of (extension | restriction | list | union)) : ''
id = ID
targetNamespace = anyURI
version = token
xml:lang = language
{any attributes with non-schema namespace . . .}>
Content: ((include | import | redefine | annotation)*, (((simpleType | complexType | group | attributeGroup) | element | attribute | notation), annotation*)*)
</schema>
See http://www.w3.org/TR/xmlschema-1/#key-schema, "3.15.2 XML Representations of Schemas"
参见http://www.w3.org/TR/xmlschema-1/#key-schema，“3.15.2XML 模式表示”
However, if you published the schema, then I think the best way to deal with it would be to use the target namespace. This would enforce the right version being used (but break compatibility)
但是，如果您发布了架构，那么我认为处理它的最佳方法是使用目标命名空间。这将强制使用正确的版本（但会破坏兼容性）
