Customizing the metamodel : Keywords for USRPROPS : RELATIONSHIP LABEL
  
RELATIONSHIP LABEL
The RELATIONSHIP LABEL can be used with an explicit relationship. As with all standard definition types an explicit relationship can have a label.
Example
DEFINITION "Enacted By" RELATIONSHIP LABEL "Enacted By" REVERSELABEL "My Reverse Label"
{
Browser { OMITKEY }
Chapter "From and To"
PROPERTY "Source"{ EDIT HETEROGENEOUSONEOF "EA Mission" AND_SUBTYPES FROMDEF}
PROPERTY "Target"{ EDIT HETEROGENEOUSONEOF "EA Vision" AND_SUBTYPES TODEF}
}
Note An explicit relationship can also have a reverse label. The REVERSELABEL is required for a future enhancement.