62.4.8 Entity Names

The name and role_name fields in the 59.11 ENTITY_NAME QosPolicy (DDS Extension) have three distinct possible values: NULL, an empty string, and a non-empty string. Each of these three states are specified in XML in a different way.

To specify that the name or role_name of an entity is NULL, use the xsi:nil attribute. The xsi:nil attribute can be set to either "true" or "false". For example, to set the participant name to NULL:

<participant_name>
    <name xsi:nil="true">
</participant_name>

To specify the empty string, leave the XML element empty:

<participant_name>
    <name/>
</participant_name>

To specify a non-empty string:

<participant_name>
    <name>"My Participant's Name"</name>
</participant_name>