schematic

Short definition from Wiktionary

Adjective

1. 1
   Represented too simply or in an overly formulaic way, reflecting a shallow or incomplete understanding of complex subject matter.
2. 2
   Sketchy, incomplete.
3. 3
   Relating to a schema.

Noun

1. 1
   A simplified line drawing used by scientists, engineers, technologists and others to illustrate a system at an abstract level. Schematic drawings often use standard symbols for clarity.