The SEDRIS Data Representation Model
APPENDIX A - Classes
Source

Class Name: Source

Superclass - <SEDRIS Abstract Base>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

A description of a source or intermediate dataset used during data generation. The term 'source' is used loosely, and covers intermediate forms and final products as well as the original data sources.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

Example

  1. Description of a VPF database used as a source of feature information.

FAQs

What is the purpose of this class?
This class provides a mechanism for documenting the sources used in environmental database generation. It can also be used to document intermediate forms of the data, as well as final products. In conjunction with the <Process> class, this class can be used to construct a network-like description of the database generation process, consisting of processing steps linked by their input and output data. This class uses a <Citation> component to refer to the source data, so it has the flavor of a bibliographical reference, and can be used to refer to books, maps, presentations, or any other type of 'publication', as well as to digital data sets. Each <Source> instance includes a field in which the nature of the contribution of each source to the result can be described.

Constraints

Associated by (one-way)

Composed of (two-way)

Composed of (two-way metadata)

Component of (two-way)

Inherited Field Elements

This class has no inherited field elements.

Field Elements

SE_String description; (notes)
SE_Integer_Positive scale; (notes)
SE_String contribution; (notes)

Notes

Composed of Notes


Citation

 citation for the source data set (Mandatory)

Time_Interval

 time period described by the source data set (Mandatory)

Fields Notes


description

 description of the source data set (Mandatory)

scale

 scale of the source data set (e.g., 24000 for a "1:24,000" scale)

contribution

 what the source data set contributes to the result (Optional)

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Last updated: October 1, 2002 Copyright © 2002 SEDRIS™