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Information Systems & DB, user orintation - Coggle Diagram
Information Systems & DB
Classification of IS
Automated IS
hardware/software complexes
technologies
personnel
Not automatical
IS Components
Hardware
Comp devices
Special technical devices
Basis of IS
Software
System software
choosing a solution
Data entry!
Placement on the media
Modification
Access
Support for the equipment
Custom software
solve tasks to meet the needs
Communications(netware)
Hardware network communications
Software support
Technical Support
intagrates the components into system
Organizational Support
Managment of integrated components and operations
Linguistic Support
Indexing texts
Thematic rubricating
formalazing the contents
Middleware(Intermediate layer)
control the interaction of objects
Information
Functional content
result of the actions
generation&presentation
data processing
information transfer
Representive content
range of actions
presentation through data
grouping into documents
structuring
Data
Tables
Graphs
Films
IS Function
Collecting
Processing
Storing
Searhing
Issuing
Transmitting
DB
Components
instances of records
areas controlled by a particular scheme
Architectural levels
Conseptual Model
a formal representation of a set of thoughts.
modeling
of the PD is a process of constructing a conceptual model.
schema
- documenting the PD conceptual model.
Internal Model
Functions
improve data processing performance;
describe and maintain storage structures and access methods;
physical independence of data.
External Model
Functions
data representation
security (protection) of data.
logical data independence.
DBMS
Functions
the logical data model support;
interaction of logical and physical data structures;
security and integrity of the data;
support for the database.
linguistic tools;
Requirements for the IS
perfomance
relevance
reliability
user orintation