In the data modeling practice, entity is foundational, and a key element of the Entity-Relationship Diagram or ERD. The first step in attempting a logical data model is to start listing off the ...

The specification of SBGN entity relationship diagram level 1 defines three major classes of glyphs: entity nodes, statements and influences (logical operators are entity nodes). We summarize the ...

Occasionally one sees an entity-relationship diagram (ERD) having an unusual characteristic ... or even the department manager’s name. Databases support date logic, but not-so-much the more arbitrary ...