The SEDRIS Data Representation Model
APPENDIX A - Classes
Source
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Class Name: Source
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
- 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.
Notes
Composed of Notes
citation for the source data set (Mandatory)
time period described by the source data set (Mandatory)
Fields Notes
description of the source data set (Mandatory)
scale of the source data set (e.g., 24000 for a "1:24,000" scale)
what the source data set contributes to the result (Optional)
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Last updated: October 1, 2002
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Copyright © 2002 SEDRIS
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