In the last 2 releases, the @internal tag is not recognized by the XML output.

In versions 1.7.1 and earlier, the \internal tag would generate an <internal/> tag in the <detaileddescription> structure of the XML output; it no longer does this.  Internal docs are now indistinguishable from public docs.

Source sample:

typedef enum {
    /// @internal
    SAMPLE_API_ENUM = 50
} sample_enum;

1.7.1 Output:

        <enumvalue id="sampleapime_8h_1a7f9d02e9a1fafd2b6ab3ce471344b381ae3699e9ee5a0d4ed0d33438891f8f17e" prot="public">
          <name>SAMPLE_API_ENUM</name>
          <initializer> 50</initializer>
          <briefdescription>
          </briefdescription>
          <detaileddescription>
<internal/>
          </detaileddescription>
        </enumvalue>

1.7.2 and 1.7.3 Output:

        <enumvalue id="sampleapime_8h_1a7f9d02e9a1fafd2b6ab3ce471344b381ae3699e9ee5a0d4ed0d33438891f8f17e" prot="public">
          <name>SAMPLE_API_ENUM</name>
          <initializer> 50</initializer>
          <briefdescription>
          </briefdescription>
          <detaileddescription>
          </detaileddescription>
        </enumvalue>