Class Name: Data Table Library
Definition
A derived Library containing
Data Tables that can be referenced
or 'instanced' by an object within the transmittal. If the particular
Data Table is a Property
Grid, the associating Geometry must have a
Location that is used as the origin for the
spatial Axes in the Property
Grid - most often a Property
Grid Hook Point. A (non-spatial) Property
Table is assumed to provide information that applies
to the entire associating Geometry or
Feature. A
Property Table Reference
may be employed to select a (N-1)-dimensional slice from the
referenced Data Table in the
Library.
Primary Page in DRM Diagram:
Secondary Pages in DRM Diagram:
Example
- A generic seamount could be modeled as a 2-d
Property Grid
of the bottom elevation, surface properties, etc. This grid could
be 'instanced' multiple places in the environment by means of
Property Grid Hook Points
to construct a desired situation for
training sonar operators.
- A table of material properties can be placed in the
Data Table Library and accessed via
Property Table References to
identify the materials
and their properties for objects in the given transmittal, e.g. the
optical or electromagnetic properties in various wavelength bands.
FAQs
- Why place a Data Table in a
Library rather than directly under an
Environment Root?
- Most often so that it can be reused easily ('instanced' or referenced)
from multiple places in the transmittal. This sharing can be especially
important for tables such as material properties that do not 'belong'
to any one object in the normal sense. An additional reason may be to
make the Data Table Library the
progenitor of the Data Table, i.e., to make the
Data Table Library the master manager of
the memory allocation for the table.
- When should a table not be placed in a
Data Table Library?
- There are no situations that are prohibited by SEDRIS data
representation model or business rules. However, there is little benefit
from placing a Data Table in the
Data Table Library if it is not shared
by many other objects in the transmittal.
Constraints
None.
Composed of (two-way)
Composed of (one-way metadata)(inherited)
Component of (two-way)
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