Class Name: Translation Control Link

Superclass - <Control Link>

Subclasses

Definition

The specialized <Control Link> used to provide the connection between an ordered aggregation of <Expressions> and the target fields of a <Translation>.

The expr_index field is a 1-based index into the ordered aggregation of < Expressions>, used to select the specific < Expression> that defines <Translation's> translation_amount field.

The lower_index field is a 1-based index into the ordered aggregation of <Expressions>, used to select the specific <Expression> that defines the lower limit for <Translation's> translation_amount.

The upper_index field is a 1-based index into the ordered aggregation of <Expressions>, used to select the specific <Expression> that defines the upper limit for <Translation's> translation_amount.

Primary Page in DRM Diagram:

• 17

Secondary Pages in DRM Diagram:

• 7

Example

1. Consider a <Geometry Model> of a building, containing a < Geometry Model Instance> of an elevator car, where both <Models> are specified in a 3D LSR spatial reference frame, and the elevator car is intended to be a moving part of the building model. The < LSR Transformation> used to instance the elevator model into the building shall specify a <Translation> component with a < Translation Control Link>.

   This <Translation Control Link> specifies:

   1. A <Literal>, defining the lower limit (the bottom of the elevator shaft) of the translation, in this case, 0.0 metres.

   2. A <Literal>, defining the upper limit (the top of the elevator shaft) of the translation, in this case, 500.0 metres.

   3. A <Variable>, the actual translation of the elevator along the elevator shaft's z axis at any given moment.

      The <Variable>'s meaning = { SE_ELEM_CODE_TYP_VARIABLE, { SE_VAR_CODE_TRANSLATION_AMOUNT }}

      The <Variable>'s value_unit = EUC_METRE and its ESC_UNI, because <Translation>, by definition, defines its fields in metres.

FAQs

Constraints

Composed of (two-way)(inherited)

• one or more {ordered} <Expression> instances

Component of (two-way)

• one or more <Translation> instances

Inherited Field Elements

Field Elements

Notes

Fields Notes

description

 A text description of what the <Control Link> is for

expr_index

 This identifies a component <Expression>, the value of which
 specifies the value of the translation_amount field of the
 affected <Translation> instance(s).

lower_index

 This specifies which component <Expression>, if any, specifies
 the lower limit of the translation_amount. A value of zero (0)
 indicates that no lower limit is being specified.

upper_index

 This specifies which component <Expression>, if any, specifies
 the upper limit of the translation_amount. A value of zero (0)
 indicates that no upper limit is being specified.