Information model Data model

example of express g information model

an information model not type of data model, more or less alternative model. within field of software engineering both data model , information model can abstract, formal representations of entity types includes properties, relationships , operations can performed on them. entity types in model may kinds of real-world objects, such devices in network, or may abstract, such entities used in billing system. typically, used model constrained domain can described closed set of entity types, properties, relationships , operations.

according lee (1999) information model representation of concepts, relationships, constraints, rules, , operations specify data semantics chosen domain of discourse. can provide sharable, stable, , organized structure of information requirements domain context. more in general term information model used models of individual things, such facilities, buildings, process plants, etc. in cases concept specialised facility information model, building information model, plant information model, etc. such information model integration of model of facility data , documents facility.

an information model provides formalism description of problem domain without constraining how description mapped actual implementation in software. there may many mappings of information model. such mappings called data models, irrespective of whether object models (e.g. using uml), entity relationship models or xml schemas.

document object model, standard object model representing html or xml