Concepts distinguish one system from another and also define product families.

Entities in the same semantic neighborhood but without a typed relation to this one — candidates for new edges or unrecognized duplicates.

• Concepts are the building blocks of software systems, objective features of a system’s design.claim0.826
  Asserts that concepts are not just mental but concrete design elements.
• Concepts are cognitive structures that give coherent account of immediate consequences in complex systemsclaim0.798
  Jackson's core assertion about the role of concepts as explanatory structures bridging action and consequence
• Concepts are not just subjective mental constructs, but are objective features of a system's design: increments of functionality that were consciously introduced by a designer to serve particular purposes.concept0.793
  Central definition from the abstract.
• A concept is a structure invented to give a coherent account of the immediate consequences of actions in a complex system.claim0.791
  Jackson's operational definition of a software concept.
• What exactly is a 'concept' and how do we distinguish good concepts from bad ones?question0.786
  Jackson identifies this as a central unresolved research question despite widespread recognition of concept importance
• Conceptconcept0.775
  Central entity of Jackson's framework: a structure invented to give coherent account of immediate consequences of actions; the building block of software design
• A concept is a structure that is invented to give a coherent account of the immediate consequences of actions in a complex system.concept0.774
  Operational definition of concept.
• The fifteen properties define the enormous family of systems, among all possible systems, which have life in themclaim0.770
  Claim that the properties collectively characterize the morphologically complex but recognizable family of all living spatial systems across cultures, climates, and technologies spanning 3500 years