330 A Glossary within a deme, programs are generally similar enough that reasonable syntax-semantics correlation obtains. e Derived Hypergraph: The SMEPH hypergraph obtained via modeling a system in terms of a hypergraph representing its internal states and their relationships. For instance, a SMEPH vertex represents a collection of internal states that habitually occur in relation to similar external situations. A SMEPH edge represents a relationship between two SMEPH vertices (e.g. a similarity or inheritance relationship). The terminology "edge /vertex” is used in this context, to distinguish from the “link / node” terminology used in the context of the Atomspace. e DeSTIN — Deep SpatioTemporal Inference Network: A specific CSDLN created by Itamar Arel, tested on visual perception, and appropriate for integration within CogPrime. e Dialogue: Linguistic interaction between two or more parties. In a CogPrime context, this may be in English or another natural language, or it may be in Lojban or Psynese. e Dialogue Control: The process of determining what to say at each juncture in a dialogue. This is distinguished from the linguistic aspects of dialogue, language comprehension and language generation. Dialogue control applies to Psynese or Lojban, as well as to human natural language. e Dimensional Embedding: The process of embedding entities from some non-dimensional space (e.g. the Atomspace) into an n-dimensional Euclidean space. This can be useful in an AI context because some sorts of queries (e.g. “find everything similar to X”, "find a path between X and Y”) are much faster to carry out among points in a Euclidean space, than among entities in a space with less geometric structure. e Distributed Atomspace: An implementation of an Atomspace that spans multiple com- putational processes; generally this is done to enable spreading an Atomspace across mul- tiple machines. e Dual Network: A network of mental or informational entities with both a hierarchica