representing_geometric

Template:— representing_geometric_property (rep_geom_prop)
Capability:representing_properties_numerically

Date: 2011/10/24 15:44:06
Revision: 1.4

Cover Contents Description Model diags.Input params.Ref. params.Instantiation path Instance diags.Characterizations Issues in situ

Error T1: There is no template_proxy in the capability representing_properties_numerically for the template representing_geometric_property

This section specifies the template representing_geometric_property.

NOTE The template has been defined in the context of the capability representing_properties_numerically which provides an overall description of the relevant parts of the ISO 10303-239 information model and a description of related templates.

NOTE An explanation of a template and the associated instantiation path is provided in the Template overview section.

Description

This template describes how to a represent property in terms of a Cartesian point.

Model diagrams

The EXPRESS-G diagram in Figure 1 shows the templates and EXPRESS entities that are required to represent the template "representing_geometric_property". The text highlighted in blue shows the template parameters.

Figure 1 — An EXPRESS-G representation of the Information model for representing_geometric_property

The graphic for the template to be used in other EXPRESS-G diagrams is shown in Figure 2 below.

Figure 2 — The graphical representation of the representing_geometric_property template

Input parameters

The following input parameters are defined for this template:

geometric_context (Type= 'ENTITY (Geometric_coordinate_space)' )

The coordinate space that provides the context for the CAD model.

point (Type='STRING')

The name of the cartesian point.

coordinates (Type= 'TYPE (length_measure)' )

A list of the three (X, Y, and Z) coordiantes of the cartesian point.

Reference parameters

The following reference parameters are defined for this template:

cartesian_point(Type='ENTITY (Cartesian_point)')

Allow the Cartesian_point entity instantiated in this path to be referenced when this template is used.

Note: The Cartesian_point entity can be referenced in a template path by:

%^target = $representing_geometric_property.cartesian_point%

where target is the parameter to which the Cartesian_point is bound.

model(Type='ENTITY (Geometric_model)')

Allow the Geometric_model entity instantiated in this path to be referenced when this template is used.

Note: The Geometric_model entity can be referenced in a template path by:

%^target = $representing_geometric_property.model%

where target is the parameter to which the Geometric_model is bound.

Instantiation path

The instantiation path shown below specifies the entities that are to be instantiated by the template.

A description of templates and the syntax for the instantiation path is provided in the Templates Help/Information section.

-- Instantiate Cartesian_point
Cartesian_point
%^cartesian_point = Cartesian_point%

-- Set the used Cartesian_point attributes to the corresponding input parameters
Cartesian_point.name = @point
Cartesian_point.coordinates = @coordinates

-- Instantiate Geometric_model
Geometric_model

-- Bind the Geometric_model to the parameter ^model
%^model = Geometric_model%

-- Set the unused Geometric_model attributes to be ignored
Geometric_model.id = '/IGNORE'
Geometric_model.name = '/IGNORE'
Geometric_model.description = '/IGNORE'
Geometric_model.version_id = '/IGNORE'

-- leave Geometric_model.model_extent unset
-- Instantiate the used Geometric_model relationsips
Geometric_model.context_of_items -> @geometric_context
Geometric_model.items -> ^cartesian_point

The following entities are instantiated with attributes as specified:

Entity in path	Value	Inherited from
Cartesian_point.name	@point	Representation_item.name
Cartesian_point.coordinates	@coordinates	—
Geometric_model.id	'/IGNORE'	Representation.id
Geometric_model.name	'/IGNORE'	Representation.name
Geometric_model.description	'/IGNORE'	Representation.description
Geometric_model.version_id	'/IGNORE'	—

Instance diagrams

The instance diagram in Figure 3 shows an example of the EXPRESS entities and templates that are instantiated by the template:

/representing_geometric_property(geometric_context='', point='Interface point', coordinates='2, 3, 4')/

(an illustration of the consolidated representing_geometric_property template is shown in Figure 4 below.)

Figure 3 — Entities instantiated by representing_geometric_property template

The instance diagram in Figure 4 shows the graphic symbol for the template that is to be used in other instance diagrams. The example template is:

/representing_geometric_property(geometric_context='', point='Interface point', coordinates='2, 3, 4')/

Figure 4 — Instantiation of representing_geometric_property template

Characterizations

No common characterizations of the template representing_geometric_property have been identified. However, the ISO 10303-239 EXPRESS model may enable other assignments to the entities instantiated by the template.