Comment 7 for bug 399319

Instead of dumping raw text files which will change as new udev rules are introduced, I would propose that Launchpad exposes an API defining what it defines as a device. The current implementation is obviously coupled with what HAL defines as a device. Only a fraction of this information is actually used by Launchpad, so there seems to be a divide between both definitions.

Without being intimately familiar with Launchpad internal requirements for devices, this is what I might propose as a schema to express each device:

<define name="device">
    <interleave>
        <element name="bus">
            <attribute name="value">
                <text/>
            </attribute>
        </element>
        <optional>
            <element name="driver">
                <attribute name="value">
                    <text/>
                </attribute>
            </element>
        </optional>
        <optional>
            <element name="vendor_id">
                <attribute name="value">
                    <ref name="integer"/>
                </attribute>
            </element>
            <element name="product_id">
                <attribute name="value">
                    <ref name="integer"/>
                </attribute>
            </element>
        </optional>
        <optional>
            <element name="subvendor_id">
                <attribute name="value">
                    <ref name="integer"/>
                </attribute>
            </element>
            <element name="subproduct_id">
                <attribute name="value">
                    <ref name="integer"/>
                </attribute>
            </element>
        </optional>
        <optional>
            <element name="vendor">
                <attribute name="value">
                    <text/>
                </attribute>
            </element>
        </optional>
        <optional>
            <element name="product">
                <attribute name="value">
                    <text/>
                </attribute>
            </element>
        </optional>
    </interleave>
</define>