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QuoteRef: borgA1_1985
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ThesaHelp:
references a-b
Topic:
database as a model of reality
Topic:
using a description as a name
Topic:
objects without names
Topic:
entity-relationship database model
Topic:
unique numeric names as surrogates
Topic:
abstraction by name
Topic:
database entities
Group:
relationship information
Topic:
facts as relationships between entities
Topic:
fact-based analysis for database design
Topic:
representing a relationship
Topic:
attribute-value pairs as information
Topic:
object-oriented classes
Topic:
type inheritance as reuse
Topic:
classification
Topic:
Thesa data structures
Topic:
value as an object
Topic:
non-primitive values
Topic:
abstraction by common attributes
Reference
Borgida, A., "Features of languages for the development of information systems at the conceptual level", IEEE Software, 2, 1, pp. 63-72, January 1985. Google
63 ;;Quote: an information system is a model of the real world
64 ;;Quote: in conceptual modeling, an object can exist without a unique identifier, e.g., the author of Ivanhoe is not the same as W. Scott
65 ;;Quote: in conceptual modeling, objects correspond one for one with real entities
65 ;;Quote: in conceptual modeling, an object is not the same as a unique name; allows missing proper names, modified names, and multiple names
65 ;;Quote: in conceptual modeling, relations are between objects instead of names of objects
65 ;;Quote: use attributes to express relationships; allows navigational access instead of query access with intermediate objects
66 ;;Quote: in conceptual modeling, each object is an instance of at least one class
66 ;;Quote: use inheritance of attributes and constraints to abbreviate descriptions
66 ;;Quote: object classes are themselves objects; can attach definitional information and sometimes attributes
67 ;;Quote: a value should allow sets or sequences of entities, e.g., the authors of a book
70 ;;Quote: abstraction selects certain details as important and ignores the rest
71 ;;Quote: with context modeling can access all related objects by an attribute
ThesaHelp: references a-b (396 items)
Topic: database as a model of reality (25 items)
Topic: using a description as a name (21 items)
Topic: objects without names (7 items)
Topic: entity-relationship database model (21 items)
Topic: unique numeric names as surrogates (67 items)
Topic: abstraction by name (29 items)
Topic: database entities (12 items)
Group: relationship information (5 topics, 69 quotes)
Topic: facts as relationships between entities (22 items)
Topic: fact-based analysis for database design (15 items)
Topic: representing a relationship (28 items)
Topic: attribute-value pairs as information (53 items)
Topic: object-oriented classes (66 items)
Topic: type inheritance as reuse (27 items)
Topic: classification (64 items)
Topic: Thesa data structures (59 items)
Topic: value as an object (29 items)
Topic: non-primitive values (11 items)
Topic: abstraction by common attributes (19 items)