The SEDRIS Data Representation Model
APPENDIX A - Classes
Interval Axis

Class Name: Interval Axis

Superclass - <Axis>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

An instance of this DRM class is an <Axis> instance that specifies an interval for each axis value (tick mark).

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

This class appears on only one page of the DRM class diagram.

Example

  1. Consider an <Interval Axis> instance that specifies wavelength bands in centimetres. Its field values are specified as follows:
    axis_type = EAC_WAVELENGTH
    axis_value_count = 3
    axis_interval_value_array[0] = {SE_INTRVLVALTYP_FLOAT, EUC_METRE, ESC_CENTI, {EDCS_NVT_GE_LT_INTERVAL, 2.4, 3.75}}
    axis_interval_value_array[1] = {SE_INTRVLVALTYP_FLOAT, EUC_METRE, ESC_CENTI, {EDCS_NVT_GE_LT_INTERVAL, 3.75, 7.5}}
    axis_interval_value_array[2] = {SE_INTRVLVALTYP_FLOAT, EUC_METRE, ESC_CENTI, {EDCS_NVT_GE_LT_INTERVAL, 7.5, 15.0}}

FAQs

No FAQs supplied.

Constraints

Component of (two-way) (inherited)

Inherited Field Elements

EDCS_Attribute_Code axis_type; 1
SE_Short_Integer_Positive axis_value_count; 2

Field Elements

SE_Interval_Value axis_interval_value_array[]; 3
EDCS_Unit_Code value_unit; 4
EDCS_Unit_Scale_Code value_scale; 5

Notes

Fields Notes

axis_type

The axis_type field specifies the property being described by the <Axis> instance.

axis_value_count

The axis_value_count specifies the number of tick marks along the <Axis> instance.

axis_interval_value_array

The axis_interval_value_array field specifies the array of tick mark values, each of which is an interval. While the intervals are not required to be adjacent in a single <Interval Axis> instance, the intervals may not overlap and they shall be in monotonically ascending or monotonically descending order.

If a boundary point can belong to only one interval (that is, there is a gap on one side of the point), it is considered to lie in that interval. If a boundary point is simultaneously the upper bound of one interval and the lower bound of another, it belongs to the interval of which it is the minimal value.

value_unit

The value_unit field specifies the unit of measurement of the <Interval Axis> instance, which shall be compatible with the requirements imposed by its axis_type value.

If the specified axis_type does not require a unit of measurement, value_unit shall be set to EUC_UNITLESS.

value_scale

The value_scale field specifies the scale applicable to value_unit.

If the specified axis_type does not require a scale, value_scale shall be set to ESC_UNI.

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Last updated: July 26, 2006 Copyright © 2006 SEDRIS™