e_KnowledgeItem : WissDB: The Logical Data Model
e_KnowledgeItem : WissDB: Data Model & Data Model Semantics
e_Result : WissDB: The Logical Data Model
e_Result : WissDB: Data Model & Data Model Semantics
e_x1 : WissDB: The Logical Data Model
e_x2 : WissDB: The Logical Data Model
e_x : WissDB: The Logical Data Model
e_ : ERD Notation: A formal Language to specify Data Models
e_ : WissDB: The Logical Data Model