Support As a practicioner who has used IDEF in the past, that is how I would search for it and I would refer to it.  While the arguement surrounding UML and BPMN is a good one, these acronyms are commonly known by about 30% of the practioner community in spelled out form.  I would place the level at below 5% for IDEF.  I think this Google Trends page illustrates this point nicely.