如何在现有EDMX格式XML文件的根标签内添加内容？

Great question! Let’s break down how to safely add content to the root tag of your EDMX file while keeping it valid per the OData 4.0 specification.

Adding Child Elements #

The root <edmx:Edmx> tag in EDMX 4.0 follows a strict structure: it can contain zero or more <edmx:Reference> elements followed by exactly one <edmx:DataServices> element. So if you need to add additional schema references, insert new <edmx:Reference> nodes either before or after your existing one (but always before the <edmx:DataServices> section).

Here’s an example of modifying your existing file to add a new reference:

<edmx:Edmx xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx" Version="4.0">
  <!-- Existing reference -->
  <edmx:Reference Uri="/redfish/v1/Schemas/Resource_v1.xml">
    <edmx:Include Namespace="Resource"/>
    <edmx:Include Namespace="Resource.v1_0_0"/>
    <edmx:Include Namespace="Resource.v1_0_2"/>
    <edmx:Include Namespace="Resource.v1_4_0"/>
  </edmx:Reference>
  
  <!-- New reference added here -->
  <edmx:Reference Uri="/redfish/v1/Schemas/ComputerSystem_v1.xml">
    <edmx:Include Namespace="ComputerSystem"/>
    <edmx:Include Namespace="ComputerSystem.v1_10_0"/>
  </edmx:Reference>

  <edmx:DataServices>
    <Schema xmlns="http://docs.oasis-open.org/odata/ns/edm" ...>
      <!-- Existing schema content -->
    </Schema>
  </edmx:DataServices>
</edmx:Edmx>

Adding Custom Attributes #

If you need to add custom attributes to the root <edmx:Edmx> tag, use a custom XML namespace to avoid conflicts with standard EDMX attributes. This ensures tooling that relies on the official EDMX schema won’t break:

<edmx:Edmx 
  xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx" 
  xmlns:custom="http://your-custom-namespace.com/edmx"
  Version="4.0"
  custom:ModifiedBy="YourName"
  custom:LastUpdated="2024-05-20">
  
  <!-- Existing child elements -->
</edmx:Edmx>

Quick Validation Tips #

• Double-check that all tags are properly closed and nested.
• Never place <edmx:DataServices> before <edmx:Reference> elements—this violates the EDMX 4.0 spec.
• Test your modified file with an EDMX validator (like OData’s official tooling) to catch any issues early.

内容的提问来源于stack exchange，提问作者kishore