ISO/IEC 18023-1 -- 5 Fundamental data types

This clause specifies the fundamental data types used within this part of ISO/IEC 18023 to specify the various DRM class instances that are to be represented. Such data types are composed of basic and constructed fundamental data types. The DRM class specifications contained in 6.2 DRM class specifications use the fundamental data types as the building blocks for creating DRM objects. The API specified in 8 Application program interface (API) uses both the data types and data class specifications to pass information between the application program and the transmittal.

5.2 Basic fundamental data types

5.2.1 Overview

More complex data types are formed from simple data types. These simple data types represent single pieces of information such as integers, floating point numbers, alphanumeric characters including strings of these, Booleans and other individual data constructs.

5.2.2 Octet

The Octet data type specifies an eight-bit field whose meaning is unknown or is determined by external factors.

5.2.3 Integers

5.2.3.1 Description

Several data types for integer numbers are provided. There are both general integer and non-negative integer data types. These are intended to correspond to signed and unsigned integer data types in programming languages.

5.2.3.2 Byte

The Byte data type specifies an integer that can represent a value in the range [-127..127].

5.2.3.3 Byte_Unsigned

The Byte_Unsigned data type specifies an integer that can represent a value in the range [0..255].

5.2.3.4 Byte_Positive

The Byte_Positive data type specifies an integer that can represent a value in the range [1..255].

5.2.3.5 Short_Integer

The Short_Integer data type specifies an integer that can represent a value in the range [-32767..32767].

5.2.3.6 Short_Integer_Unsigned

The Short_Integer_Unsigned data type specifies an integer that can represent a value in the range [0..65535].

5.2.3.7 Short_Integer_Positive

The Short_Integer_Positive data type specifies an integer that can represent a value in the range [1..65535].

5.2.3.8 Integer

The Integer data type specifies an integer that can represent a value in the range [-2 147 483 647..2 147 483 647].

5.2.3.9 Integer_Unsigned

The Integer_Unsigned data type specifies an integer that can represent a value in the range [0..4 294 967 295].

5.2.3.10 Integer_Positive

The Integer_Positive data type specifies an integer that can represent a value in the range [1..4 294 967 295].

5.2.4 Floating point numbers

5.2.4.1 Description

The floating point number fundamental data types correspond to the single-precision and double-precision floating point types specified by IEC 60559. The specific values for POSITIVE_INFINITY and NEGATIVE_INFINITY shall be supported. However, implementations on architectures that support other floating point representations are allowed and shall support POSITIVE_INFINITY and NEGATIVE_INFINITY as provided in those floating point representations.

5.2.4.2 Float

The Float data type specifies a single-precision floating point number as specified in IEC 60559.

5.2.4.3 Long_Float

The Long_Float data type specifies a double-precision floating point number as specified in IEC 60559.

5.2.5 Characters and strings

5.2.5.1 Description

Alphanumeric characters are encoded as UTF-8 as specified in ISO/IEC 10646 (otherwise known as Unicode). UTF-8 supports Latin characters single octets as specified in ISO/IEC 646 but also has the ability of representing international characters. Each character is comprised of one through six bytes as specified in ISO/IEC 10646-1. Hence, an abstract character is of variable length. A string is a list of such characters along with codes that specify how the string is to be interpreted (see 5.3.3.262 String).

5.2.5.2 Character

5.2.5.3 Character strings

Strings of characters are addressed by the String data type specified in 5.3.3.262 String and also by the String data type specified in 5.6.2.16 EDCS_String.

5.2.6 Enumerated data types

5.2.6.1 Description

An enumerated data type consists of a list of names. Each name can be a value in an instance of that data type. The names are assigned numbers whose values indicate the position within the ordered list. It is these numbers that are actually manipulated by the implementation.

The enumerated data types that are supported by this part of ISO/IEC 18023 are specified below.

5.2.6.2 Access_Mode

Table 5.2 defines the Access_Mode data type that specifies how a transmittal is to be opened.

Table 5.2 — Access_Mode values

Value	Description
READ_ONLY	The transmittal is to be opened with only read access.
UPDATE	An existing transmittal is to be opened with the ability to make changes in the content.
CREATE	A new empty transmittal is to be opened with the ability to add and subsequently change content.

5.2.6.3 Boolean

Table 5.3 — Boolean values

Value	Description
FALSE	The value of the associated field is specified to be false.
TRUE	The value of the associated field is specified to be true.

5.2.6.4 Branch_Range_Matching

Table 5.4 defines the Branch_Range_Matching data type that specifies, when evaluating the branches of a <DRM Aggregate Feature> or <DRM Aggregate Geometry> instance against a range of search values, how to evaluate the field values of a given branch’s link object against the search range, where the link object’s field values themselves specify a range of values.

Table 5.4 — Branch_Range_Matching values

Value	Description
EXACT	For a branch to be considered a match, the search value range shall exactly match the branch's value range.
FULL_CONTAINMENT	For a branch to be considered a match, the search value range shall be completely contained within the branch's value range.
INTERSECTION	For a branch to be considered a match, the search value range shall intersect the branch's value range.

5.2.6.5 Colour_Binding

Table 5.5 defines the Colour_Binding data type that specifies which type of colour inheritance is in effect within the scope of the given <DRM Rendering Properties> instance.

Table 5.5 — Colour_Binding values

Value	Description
NORMAL	The colour of a geometry attribute is specified as the default attribute binding. Attributes specified by a component shall override its parent (i.e., the last colour wins).
PARENT_OVERRIDE	This setting allows the given instance of a <DRM Geometry Representation> concrete subclass to override the default attribute binding; that is, to override any <DRM Colour> instances specified by objects in its component tree.

5.2.6.6 Continuous_LOD_Select_Choice

Table 5.6 defines the Continuous_LOD_Select_Choice data type that specifies which level (or levels) of detail are to be traversed.

Table 5.6 — Continuous_LOD_Select_Choice values

Value	Description
ALL	All levels are to be traversed.
LEAST_DETAILED	The least detailed level is to be traversed.
MOST_DETAILED	The most detailed level is to be traversed.

Continuous_LOD_Select_Choice ::= (
   ALL,
   LEAST_DETAILED,
   MOST_DETAILED )

5.2.6.7 Hierarchy_Inclusion

Table 5.7 defines the Hierarchy_Inclusion data type that specifies, for a given subclass of <DRM Aggregate Feature> or <DRM Aggregate Geometry>, whether the instances and their components are included or excluded from a search..

Table 5.7 — Hierarchy_Inclusion values

Value	Description
EXCLUDE_ALL	All instances and their components are to be excluded.
INCLUDE_ALL	All instances and their components are to be included.
EVALUATE_RULES	Instances and their components are included only if they pass a set of specified conditions.

5.2.6.8 Image_Scan_Direction

Table 5.8 defines the Image_Scan_Direction data type that specifies the manner in which an image layer is to be scanned.

Table 5.8 — Image_Scan_Direction values

Value	Major scan	Minor scan	Image origin
RIGHT_UP	left to right	bottom to top	lower left
RIGHT_DOWN	left to right	top to bottom	upper left
DOWN_RIGHT	top to bottom	left to right	upper left
DOWN_LEFT	top to bottom	right to left	upper right
LEFT_UP	right to left	bottom to top	lower right
LEFT_DOWN	right to left	top to bottom	upper right
UP_RIGHT	bottom to top	left to right	lower left
UP_LEFT	bottom to top	right to left	lower right

EXAMPLE Assume an image is displayed in a Cartesian 2D space with the positive X axis pointing right, and the positive Y axis pointing up, as shown in Figure 5.1. Further, assume an image of size W×H in this 2D space has W image elements in the X direction and H image elements in the Y direction. A scan direction of RIGHT_UP means that the image data is stored such that the first image element in memory corresponds to the (0 0) coordinate of this 2D space, and the next image elements should be displayed on the positively increasing X axis (the minor scan), until W image elements are displayed (W 0). The next image element will correspond to the (0 1) coordinate of the 2D space. Once the image element (W 1) is reached, the scan direction will continue to move from bottom to top on the positively increasing Y axis, for each successive scan line, until H lines have been accessed.

Image Scan Direction XY

Figure 5.1 — Image scan direction in X and Y

Image_Scan_Direction ::= (
   RIGHT_UP,
   RIGHT_DOWN,
   DOWN_RIGHT,
   DOWN_LEFT,
   LEFT_UP,
   LEFT_DOWN,
   UP_RIGHT,
   UP_LEFT )

5.2.6.9 Image_Scan_Direction_Z

Table 5.9 defines the Image_Scan_Direction_Z data type that specifies the manner in which image depth is to be scanned.

Table 5.9 — Image_Scan_Direction_Z values

Value	Scan direction	Image origin
NONE	Not applicable	Not applicable
Z_BACK	front to back	front
Z_FRONT	back to front	back

EXAMPLE Following the example in 5.2.6.8 Image_Scan_Direction, assume an image is displayed in a right-handed Cartesian 3D space with the positive Z axis pointed towards the viewer, as shown in Figure 5.2. A scan direction of Z_FRONT means that the image elements are organized such that successive groups of XY elements (as described in 5.2.6.8 Image_Scan_Direction) are displayed starting at Z=0 and in the direction of the positive Z axis.

Image Scan Direction Z

Figure 5.2 — Image scan direction in Z

5.2.6.10 Interval_Type

Table 5.10 defines the Interval_Type data type that specifies the type of interval for the various interval data types.

Table 5.10 — Interval_Type values

Value	Description
OPEN_INTERVAL	The interval does not include the value at each end of the interval.
GE_LT_INTERVAL	The end value of lowest value is included but the end value of highest value is not included.
GT_LE_INTERVAL	The end value of lowest value is not included but the end value of highest value is included.
CLOSED_INTERVAL	The interval includes the value at each end of the interval.
GT_SEMI_INTERVAL	The lower end value is -∞ and the upper end value is not included.
GE_SEMI_INTERVAL	The lower end value is -∞ and the upper end value is included.
LT_SEMI_INTERVAL	The lower end value is not included and the upper end value is ∞.
LE_SEMI_INTERVAL	The lower end value is included and the upper end value is ∞.

Interval_Type ::= (
   OPEN_INTERVAL,
   GE_LT_INTERVAL,
   GT_LE_INTERVAL,
   CLOSED_INTERVAL,
   GT_SEMI_INTERVAL,
   GE_SEMI_INTERVAL,
   LT_SEMI_INTERVAL,
   LE_SEMI_INTERVAL )

5.2.6.11 ITR_Behaviour

Table 5.11 defines the ITR_Behaviour data type that specifies the desired traversal for an iterator or function when an ITR reference is encountered.

Table 5.11 — ITR_Behaviour values

Value	Description
RESOLVE	ITR references are resolved automatically as they are encountered. A transmittal that has been opened in this way cannot be updated. The transmittal shall be explicitly opened for writing or modification for RESOLVE ITR_Behaviour to occur.
REPORT	ITR references are reported as they are encountered, but are not resolved.
IGNORE	ITR references are ignored and traversal acts as though the transmittal were standalone, continuing to search within the current transmittal.

5.2.6.12 LSR_Transformation_Axis

Table 5.12 defines the LSR_Transformation_Axis data type that specifies which axis to rotate around, scale by, or translate along.

Table 5.12 — LSR_Transformation_Axis values

Value	Description
U	The X axis is the axis around which a rotation is computed and along which a scale or translation is computed.
V	The Y axis is the axis around which a rotation is computed and along which a scale or translation is computed.
W	The Z axis is the axis around which a rotation is computed and along which a scale or translation is computed.
ALL	Scaling and translation occur uniformly along all axes. This value is not valid for rotation.
AXIS_REFERENCE_VECTOR	Operations are referenced to an axis specified by a <DRM Reference Vector> component of the given <DRM LSR Transformation>.

LSR_Transformation_Axis ::= (
   U,
   V,
   W,
   ALL,
   AXIS_REFERENCE_VECTOR )

5.2.6.13 Model_Reference_Type

Table 5.13 defines the Model_Reference_Type data type that specifies how a <DRM Model> intsnace is referenced within a transmittal.

Table 5.13 — Model_Reference_Type values

Value	Description
COMPONENT	The <DRM Model> instance can be referenced only as a component of other <DRM Model> instances. In this case, the <DRM Model> instance cannot be referenced directly from a <DRM Environment Root> instance.
ROOT	The <DRM Model> instance cannot be instanced by any other <DRM Model> instance. In this case, the <DRM Model> instance can be referenced from a <DRM Environment Root> instance.
ROOT_AND_COMPONENT	The <DRM Model> instance can be instanced both by other <DRM Model> instances and from a <DRM Environment Root> instance.

5.2.6.14 Month

Table 5.14 — Month values

Value	Description
JANUARY	January.
FEBRUARY	February.
MARCH	March.
APRIL	April.
MAY	May.
JUNE	June.
JULY	July.
AUGUST	August.
SEPTEMBER	September.
OCTOBER	October.
NOVEMBER	November.
DECEMBER	December.

Month ::= (
   JANUARY,
   FEBRUARY,
   MARCH,
   APRIL,
   MAY,
   JUNE,
   JULY,
   AUGUST,
   SEPTEMBER,
   OCTOBER,
   NOVEMBER,
   DECEMBER )

5.2.6.15 Object_Inclusion

Table 5.15 defines the Object_Inclusion data type that specifies how identified objects relate to a search boundary.

Value	Description
FULLY_INCLUDED	The identified object is completely inside the search boundary specified.
PARTIALLY_INCLUDED	The identified object is either completely inside the search boundary or partially overlaps the search boundary.

5.2.6.16 Octant

The identification of the octants is as shown in Figure 5.3, where left-to-right is the orientation of the first coordinate axis, front-to-back is the orientation of the second coordinate axis, and lower-to-upper is the orientation of the third coordinate axis. The naming convention is with respect to a viewer at point “f” directly facing point “h”. The plane specified by the three points “g”, “d”, and “i” represents the dividing plane between front and back with the point “f” considered to be in the front. The plane specified by the three points “n”, “j”, and “b” represents the dividing plane between left and right with the point “g” considered to be in the left. The plane specified by the three points “g”, “h”, and “k” represents the dividing plane between top and bottom with the point “d” considered to be in the bottom. Octants can be used to specify octrees [SAMET].

Octant id

Figure 5.3 — Octant identification

Octant ::= (
   UPPER_LEFT_FRONT,
   UPPER_LEFT_BACK,
   LOWER_LEFT_FRONT,
   LOWER_LEFT_BACK,
   UPPER_RIGHT_FRONT,
   UPPER_RIGHT_BACK,
   LOWER_RIGHT_FRONT,
   LOWER_RIGHT_BACK )

5.2.6.17 Point_Light_Display_Type

Table 5.16 defines the Point_Light_Display_Type data type that specifies the technology of the display used to render a set of points of light.

Table 5.16 — Point_Light_Display_Type values

Value	Description
RASTER	The light is to be rendered during the scan of the entire display.
CALLIGRAPHIC	The light is to be rendered explicitly to the portion of the display at which the point is to be produced.

5.2.6.18 Present_In

Table 5.17 — Present_In values

Value	Description
NONE	The items are not present.
ENVIRONMENT_ROOT	The items are present within the scope of one or more <DRM Environment Root> instances.
MODELS	The items are present within the scope of one or more <DRM Model> instances.
ENVIRONMENT_ROOT_AND_MODELS	The items are present within the scope of one or more <DRM Environment Root> instances and one or more <DRM Model> instances.

Present_In ::= (
   NONE,
   ENVIRONMENT_ROOT,
   MODELS,
   ENVIRONMENT_ROOT_AND_MODELS )

5.2.6.19 Quadrant

The identification of the quadrants is as shown in Figure 5.4, where left-to-right is the orientation of the first coordinate axis and front-to-back is the orientation of the second coordinate axis. The naming convention is with respect to a viewer at point “c” directly facing point “d”. The line defined by the two points “c” and “e” specifies the division between left and right with “b” considered to be in the left. The line defined by the two points “b” and “f” specifies the division between front and back with “e” considered to be in the back. Quadrants can be used to specify quadtrees [SAMET].

Quadrant ID

Figure 5.4 — Quadrant identification

5.2.6.20 Reference_Surface_Elevation_Select

Table 5.18 defines the Reference_Surface_Elevation_Select data type that specifies the rule for selecting exactly one elevation value when the reference surface specified by the <DRM Reference Surface> instance is penetrated more than once by a ray cast from the conforming point in question perpendicular to the surface of the ellipsoid component of the ORM.

Table 5.18 — Reference_Surface_Elevation_Select values

Value	Description
CLOSEST_TO_ORM_CENTRE	The intersection element to use is the one closest to the ORM centre.
CLOSEST_TO_DSS	The intersection element to use is the one closest to the designated spatial surface (DSS).
FARTHEST_FROM_ORM_CENTRE	The intersection element to use is the one farthest from the ORM centre.

Reference_Surface_Elevation_Select ::= (
   CLOSEST_TO_ORM_CENTRE,
   CLOSEST_TO_DSS,
   FARTHEST_FROM_ORM_CENTRE )

5.2.6.21 Reference_Surface_LOD_Select

Table 5.19 — Reference_Surface_LOD_Select values

Value	Description
MOST_DETAILED	The most detailed resolution is used to resolve the conforming point.
LEAST_DETAILED	The least detailed resolution is used to resolve the conforming point.

5.2.6.22 Return_Code

Table 5.20 defines the Return_Code data type that specifies the function results of API functions.

Value	Description
FAILURE	The function failed to carry out the operation.
SUCCESS	The function successfully carried out the operation.

5.2.6.23 Search_Bounds_Closure

Table 5.21 defines the Search_Bounds_Closure data type that specifies whether a spatial search area has full or partial closure.

Each Search_Bounds value specifies an enclosed region of a tessellation. The Search_Bounds_Closure data type specifies whether the top and right boundaries of the tessellation are included in the region. This is depicted in Figure 5.5 where the search bounds region on the left has a specified value of FULLY_CLOSED. Any point intersecting the top and rightmost lines shall be included. The search bounds region on the right is specified as PARTIALLY_CLOSED. Points intersecting the topmost and rightmost lines shall not be included. By assigning appropriate Search_Bounds_Closure values, it can be ensured that a point will be encompassed by only one search bounds region.

Figure 5.5 — FULLY_CLOSED and PARTIALLY_CLOSED search bounds

Table 5.21 — Search_Bounds_Closure values

Value	Description
FULLY_CLOSED	The complete boundary of the spatial extent will be used to determine if a location is within the search bounds region.
PARTIALLY_CLOSED	Only the lower end points of the spatial extent will be used to determine if a location is within the search bounds region.

5.2.6.24 Search_Dimension

Table 5.22 defines the Search_Dimension data type that specifies whether a search will return two-dimensional DRM objects, if they are present.

To ignore <DRM Location 2D> instances, Search_Dimension value THREE_DIMENSIONAL should be specified. All other searches consider <DRM Location 2D> instances in evaluating DRM objects.

This data type also specifies whether a search will consider the height components of <DRM Location 3D> instances. To ignore the height component, search dimension TWO_DIMENSIONAL_OR_SURFACE shall be specified. All other searches shall consider the height components of <DRM Location 3D> instances during evaluation.

Table 5.22 — Search_Dimension values

Value	Description
TWO_DIMENSIONAL_OR_SURFACE	Only DRM objects specified with two-dimensional or surface coordinates will be returned.
THREE_DIMENSIONAL	Only DRM objects specified with three-dimensional coordinates will be returned.
ALL_DIMENSIONS	DRM objects specified with any type of coordinates will be returned.

Search_Dimension ::= (
   TWO_DIMENSIONAL_OR_SURFACE,
   THREE_DIMENSIONAL,
   ALL_DIMENSIONS )

5.2.6.25 Sibling_Traversal_Order

Table 5.23 defines the Sibling_Traversal_Order data type that specifies the desired traversal order for various types of components that already have a logical ordering.

Value	Description
ASCENDING	Components will be traversed in ascending order.
DESCENDING	Components will be traversed in descending order.
UNSPECIFIED	No traversal order is specified; any may be used.

5.2.6.26 State_Mismatch_Behaviour

Table 5.24 — State_Mismatch_Behaviour values

Value	Description
DEFAULT	The default state shall be displayed.
LAST	The last state shall remain.
NONE	Nothing shall be displayed.

5.2.7 Selection data types

5.2.7.1 Description

The set of values of each selection data type may be extended by registration. In contrast, the set of values of an enumerated data type may not be extended by registration. Selection data types shall be implemented by each language binding in such a manner that the set of values may be extended without invalidating pre-compiled software. Selection data types are otherwise processed in the same manner as enumerated data types.

Standard meanings are assigned to positive values from 1 through 1000. Registered meanings shall be assigned to values above 1000. Each selection data type is specified in the same manner as an enumerated data type (see 5.2.6.1 Description). Such names are presented below in upper case.

An implementation may permit negative values for selection types that are not specified in this part of ISO/IEC 18023. Transmittals that use such non-standard values do not conform to this part of ISO/IEC 18023. Non-standard values may be used to test new concepts prior to standardization or registration.

5.2.7.2 API_Function

The API_Function data type specifies the names of the available transmittal API functions.

API_FUNCTION ::= (
                 < 1 : // implementation dependent and non-conforming,
                   1 : ADD_ASSOCIATE_RELATIONSHIP,
                   2 : ADD_COMPONENT_RELATIONSHIP,
                   3 : CLONE_OBJECT_HANDLE,
                   4 : CLOSE_TRANSMITTAL,
                   5 : CREATE_OBJECT,
                   6 : CREATE_SEARCH_FILTER,
                   7 : CREATE_SPATIAL_SEARCH_BOUNDARY,
                   8 : DETERMINE_SPATIAL_INCLUSION,
                   9 : FREE_ITERATOR,
                  10 : FREE_OBJECT,
                  11 : FREE_PACKED_HIERARCHY,
                  12 : FREE_REMAINING_OBJECTS_LIST,
                  13 : FREE_REMAINING_PACKED_HIERARCHIES_LIST,
                  14 : FREE_SEARCH_FILTER,
                  15 : FREE_SPATIAL_SEARCH_BOUNDARY,
                  16 : FREE_TRANSMITTAL,
                  17 : GET_AGGREGATE,
                  18 : GET_ASSOCIATE,
                  19 : GET_COLOUR_MODEL,
                  20 : GET_COMPONENT,
                  21 : GET_CONTEXT_TRANSFORMATION,
                  22 : GET_DATA_TABLE_DATA,
                  23 : GET_DRM_CLASS,
                  24 : GET_ENCODING,
                  25 : GET_FIELDS,
                  26 : GET_IMAGE_DATA,
                  27 : GET_ITERATION_LENGTH_REMAINING,
                  28 : GET_LAST_FUNCTION_STATUS,
                  29 : GET_MESH_FACE_TABLE_DATA,
                  30 : GET_NEXT_OBJECT,
                  31 : GET_NTH_ASSOCIATE,
                  32 : GET_NTH_COMPONENT,
                  33 : GET_NUMBER_OF_PATHS_TO_TRANSMITTAL_ROOT,
                  34 : GET_OBJECT_FROM_ID_STRING,
                  35 : GET_OBJECT_ID_STRING,
                  36 : GET_OBJECT_REFERENCE_COUNT,
                  37 : GET_PACKED_HIERARCHY,
                  38 : GET_PUBLISHED_LABELS,
                  39 : GET_PUBLISHED_OBJECT_LIST,
                  40 : GET_REFERENCED_TRANSMITTAL_LIST,
                  41 : GET_RELATION_COUNTS,
                  42 : GET_REMAINING_OBJECTS_LIST,
                  43 : GET_REMAINING_PACKED_HIERARCHIES,
                  44 : GET_ROOT_OBJECT,
                  45 : GET_SRF_INFO,
                  46 : GET_TRANSMITTAL_FROM_OBJECT,
                  47 : GET_TRANSMITTAL_LOCATION,
                  48 : GET_TRANSMITTAL_NAME,
                  49 : GET_TRANSMITTAL_VERSION_INFORMATION,
                  50 : GET_UNIQUE_TRANSMITTAL_ID,
                  51 : GET_UNRESOLVED_OBJECT_FROM_PUBLISHED_LABEL,
                  52 : GET_USER_DATA,
                  53 : INITIALIZE_AGGREGATE_ITERATOR,
                  54 : INITIALIZE_ASSOCIATE_ITERATOR,
                  55 : INITIALIXE_COMPONENT_ITERATOR,
                  56 : INITIALIZE_INHERITED_COMPONENT_ITERATOR,
                  57 : IS_ITERATOR_COMPLETE,
                  58 : OBJECT_IS_PUBLISHED,
                  59 : OBJECT_IS_RESOLVED,
                  60 : OBJECTS_ARE_SAME,
                  61 : OPEN_TRANSMITTAL_BY_LOCATION,
                  62 : OPEN_TRANSMITTAL_BY_NAME,
                  63 : PUBLISH_OBJECT,
                  64 : PUT_DATA_TABLE_DATA,
                  65 : PUT_FIELDS,
                  66 : PUT_IMAGE_DATA,
                  67 : PUT_MESH_FACE_TABLE_DATA,
                  68 : REMOVE_ASSOCIATE_RELATIONSHIP,
                  69 : REMOVE_COMPONENT_RELATIONSHIP,
                  70 : REMOVE_FROM_TRANSMITTAL,
                  71 : RESOLVE_OBJECT,
                  72 : RESOLVE_TRANSMITTAL_NAME,
                  73 : SET_COLOUR_MODEL,
                  74 : SET_FIRST_ERROR_MESSAGE,
                  75 : SET_GENERAL_CALLBACK,
                  76 : SET_GENERAL_CALLBACK_FOR_ONE_FUNCTION,
                  77 : SET_ROOT_OBJECT,
                  78 : SET_SECOND_ERROR_MESSAGE,
                  79 : SET_SPECIFIC_CALLBACK,
                  80 : SET_SRF_INFO,
                  81 : SET_TRANSMITTAL_NAME,
                  82 : SET_USER_DATA,
                  83 : TRANSMITTALS_ARE_SAME,
                  84 : UNPUBLISH_OBJECT,
                  85 : USE_DEFAULT_COLOUR_MODEL,
                  86 : USE_DEFAULT_SRF_INFO,
          [87..1000] : // reserved for future standardization,
              > 1000 : // reserved for registration )

5.2.7.3 Axis_Alignment

Table 5.25 defines the Axis_Alignment data type that specifies how the data table cell value(s) associated with an axis tick mark align with the axis interval for a <DRM Regular Axis> instance. This relationship is depicted in Figure 5.6. Table 5.25 references the tick marks identified in Figure 5.6 (S_i is the value of the i^th tick mark).

Figure 5.6 — Axis_Alignment relationships

Table 5.25 — Axis_Alignment values

Value	Description
NONE	The i^th data table cell value is applicable to the entire interval [t_i, t_i+1).
LOWER	The i^th data table cell value is applicable at the t_i tick mark.
MEDIAN	The i^th data table cell value is applicable at the median of the t_i and t_i+1 tick marks.
UPPER	The i^th data table value is applicable at the t_i+1 tick mark.
GEOMETRIC_MEAN	The i^th data table cell value is applicable at the geometric mean of the t_i and t_i+1 tick marks. This kind of axis alignment is intended for use with GEOMETRIC spacing (see 5.2.7.42 Spacing_Type).

Axis_Alignment ::= (
                 < 1 : // implementation dependent and non-conforming,
                   1 : NONE,
                   2 : LOWER,
                   3 : MEDIAN,
                   4 : UPPER,
                   5 : GEOMETRIC_MEAN,
           [6..1000] : // reserved for future standardization,
              > 1000 : // reserved for registration )

5.2.7.4 Camera_Projection_Type

Table 5.26 defines the Camera_Projection_Type data type that specifies the type of projection that applies to a <DRM Camera Point> instance.

Table 5.26 — Camera_Projection_Type values

Value	Description
ORTHOGRAPHIC	The projection is a parallel projection in which the projection direction is parallel to the direction of the view.
PERSPECTIVE	The projection is a perspective projection in which all projector lines converge to a single point at the viewer.

Camera_Projection_Type ::= (
                 < 1 : // implementation dependent and non-conforming,
                   1 : ORTHOGRAPHIC,
                   2 : PERSPECTIVE,
           [3..1000] : // reserved for future standardization,
              > 1000 : // reserved for registration )

5.2.7.5 Colour_Model

Table 5.27 — Colour_Model values

Value	Description
RGB	Colour values are specified using the red-green-blue (RGB) colour model.
CMY	Colour values are specified using the cyan-magenta-yellow (CMY) colour model.
HSV	Colour values are specified using the hue-saturation-value (HSV) colour model.

Colour_Model ::= (
                 < 1 : // implementation dependent and non-conforming,
                   1 : RGB,
                   2 : CMY,
                   3 : HSV,
           [4..1000] : // reserved for future standardization,
              > 1000 : // reserved for registration )

5.2.7.6 Data_Table_Data_Value_Type

Table 5.28 defines the Data_Table_Data_Value_Type data type that specifies the type of data that is specified in an instance of Data_Table_Data.

Table 5.28 — Data_Table_Data_Value_Type values

Value	Description
SINGLE_LONG_FLOAT	Each element of data table data is a single real attribute value of type EDCS_Long_Float.
LONG_FLOAT	Each element of data table data is a real attribute value of type EDCS_Long_Float_Value.
SINGLE_INTEGER	Each element of data table data is a single integer attribute value of type EDCS_INTEGER.
INTEGER	Each element of data table data is an integer attribute value of type EDCS_Integer_Value.
SINGLE_COUNT	Each element of data table data is a single count attribute value of type EDCS_Count.
COUNT	Each element of data table data is a count attribute value of type EDCS_Count_Value.
INDEX	Each element of data table data is an index attribute value of type EDCS_Count.
STRING	Each element of data table data is a string attribute value of type EDCS_String.
CONSTRAINED_STRING	Each element of data table data is a constrained string attribute value of type EDCS_String.
KEY	Each element of data table data is a key attribute value of type EDCS_String.
ENUMERATION	Each element of data table data is an enumerated attribute value of type EDCS_Enumerant_Code.
BOOLEAN	Each element of data table data is a boolean attribute value of type EDCS_Boolean.
INDEX_CODE	Each element of data table data is an index code of type Integer_Unsigned.

Data_Table_Data_Value_Type ::= (
                 < 1 : // implementation dependent and non-conforming,
                   1 : SINGLE_LONG_FLOAT,
                   2 : LONG_FLOAT,
                   3 : SINGLE_INTEGER,
                   4 : INTEGER,
                   5 : SINGLE_COUNT,
                   6 : COUNT,
                   7 : INDEX,
                   8 : STRING,
                   9 : CONSTRAINED_STRING,
                  10 : KEY,
                  11 : ENUMERATION,
                  12 : BOOLEAN,
                  13 : INDEX_CODE,
          [14..1000] : // reserved for future standardization,
              > 1000 : // reserved for registration )

5.2.7.7 DRM_Class

The DRM_Class data type specifies the DRM classes supported by this part of ISO/IEC 18023.

DRM_Class ::= (
              < 1 : // implementation dependent and non-conforming,
                1 : NULL,
                2 : DRM_ABSOLUTE_TIME,
                3 : DRM_ABSOLUTE_TIME_INTERVAL,
                4 : DRM_AGGREGATE_FEATURE,
                5 : DRM_AGGREGATE_GEOMETRY,
                6 : DRM_ALTERNATE_HIERARCHY_RELATED_FEATURES,
                7 : DRM_ALTERNATE_HIERARCHY_RELATED_GEOMETRY,
                8 : DRM_AMBIENT_COLOUR,
                9 : DRM_ANIMATION_BEHAVIOUR,
               10 : DRM_ANIMATION_RELATED_GEOMETRY,
               11 : DRM_ARC,
               12 : DRM_AREAL_FEATURE,
               13 : DRM_ATTACHMENT_POINT,
               14 : DRM_AXIS,
               15 : DRM_BASE_ASSOCIATION_DATA,
               16 : DRM_BASE_LOD_DATA,
               17 : DRM_BASE_POSITIONAL_LIGHT,
               18 : DRM_BASE_SPATIAL_ASSOCIATION_DATA,
               19 : DRM_BASE_SUMMARY_ITEM,
               20 : DRM_BASE_TIME_DATA,
               21 : DRM_BLEND_DIRECTIONAL_LIGHT,
               22 : DRM_BOUNDING_VOLUME,
               23 : DRM_BROWSE_MEDIA,
               24 : DRM_CAMERA_POINT,
               25 : DRM_CC_3D_LOCATION,
               26 : DRM_CD_3D_LOCATION,
               27 : DRM_CD_SURFACE_LOCATION,
               28 : DRM_CITATION,
               29 : DRM_CLASSIFICATION_DATA,
               30 : DRM_CLASSIFICATION_RELATED_FEATURES,
               31 : DRM_CLASSIFICATION_RELATED_GEOMETRY,
               32 : DRM_CM_3D_LOCATION,
               33 : DRM_CMY_COLOUR,
               34 : DRM_CMY_COLOUR_CONTROL_LINK,
               35 : DRM_COLLISION_VOLUME,
               36 : DRM_COLOUR,
               37 : DRM_COLOUR_DATA,
               38 : DRM_COLOUR_INDEX,
               39 : DRM_COLOUR_INDEX_CONTROL_LINK,
               40 : DRM_COLOUR_SHININESS,
               41 : DRM_COLOUR_TABLE,
               42 : DRM_COLOUR_TABLE_GROUP,
               43 : DRM_COLOUR_TABLE_LIBRARY,
               44 : DRM_CONE_DIRECTIONAL_LIGHT,
               45 : DRM_CONFORMAL_BEHAVIOUR,
               46 : DRM_CONTACT_POINT,
               47 : DRM_CONTINUOUS_LOD_RELATED_GEOMETRY,
               48 : DRM_CONTROL_LINK,
               49 : DRM_CYLINDRICAL_VOLUME_EXTENT,
               50 : DRM_DATA_QUALITY,
               51 : DRM_DATA_TABLE,
               52 : DRM_DATA_TABLE_LIBRARY,
               53 : DRM_DIFFUSE_COLOUR,
               54 : DRM_DIRECTIONAL_LIGHT_BEHAVIOUR,
               55 : DRM_DISTANCE_LOD_DATA,
               56 : DRM_DRM_CLASS_SUMMARY_ITEM,
               57 : DRM_EC_AUGMENTED_3D_LOCATION,
               58 : DRM_EC_SURFACE_LOCATION,
               59 : DRM_EDCS_USE_SUMMARY_ITEM,
               60 : DRM_EDGE_DIRECTION,
               61 : DRM_EI_3D_LOCATION,
               62 : DRM_ELLIPSE,
               63 : DRM_EMISSIVE_COLOUR,
               64 : DRM_ENCLOSING_VOLUME,
               65 : DRM_ENUMERATION_AXIS,
               66 : DRM_ENVIRONMENT_ROOT,
               67 : DRM_ENVIRONMENTAL_DOMAIN_SUMMARY,
               68 : DRM_EXPRESSION,
               69 : DRM_FACE_DIRECTION,
               70 : DRM_FADE_RANGE,
               71 : DRM_FEATURE_EDGE,
               72 : DRM_FEATURE_FACE,
               73 : DRM_FEATURE_FACE_RING,
               74 : DRM_FEATURE_HIERARCHY,
               75 : DRM_FEATURE_MODEL,
               76 : DRM_FEATURE_MODEL_INSTANCE,
               77 : DRM_FEATURE_NODE,
               78 : DRM_FEATURE_REPRESENTATION,
               79 : DRM_FEATURE_TOPOLOGY,
               80 : DRM_FEATURE_TOPOLOGY_HIERARCHY,
               81 : DRM_FEATURE_VOLUME,
               82 : DRM_FEATURE_VOLUME_SHELL,
               83 : DRM_FINITE_ELEMENT_MESH,
               84 : DRM_FLASHING_LIGHT_BEHAVIOUR,
               85 : DRM_FUNCTION,
               86 : DRM_FUNCTIONAL_ASSOCIATION_DATA,
               87 : DRM_GEOMETRIC_CENTRE,
               88 : DRM_GEOMETRY_EDGE,
               89 : DRM_GEOMETRY_FACE,
               90 : DRM_GEOMETRY_HIERARCHY,
               91 : DRM_GEOMETRY_MODEL,
               92 : DRM_GEOMETRY_MODEL_INSTANCE,
               93 : DRM_GEOMETRY_NODE,
               94 : DRM_GEOMETRY_REPRESENTATION,
               95 : DRM_GEOMETRY_TOPOLOGY,
               96 : DRM_GEOMETRY_TOPOLOGY_HIERARCHY,
               97 : DRM_GEOMETRY_VOLUME,
               98 : DRM_GRID_OVERLAP,
               99 : DRM_HAEC_3D_LOCATION,
              100 : DRM_HEEC_3D_LOCATION,
              101 : DRM_HEEQ_3D_LOCATION,
              102 : DRM_HIERARCHY_DATA
              103 : DRM_HIERARCHY_SUMMARY_ITEM,
              104 : DRM_HSV_COLOUR,
              105 : DRM_HSV_COLOUR_CONTROL_LINK,
              106 : DRM_ICON,
              107 : DRM_IDENTIFICATION,
              108 : DRM_IMAGE,
              109 : DRM_IMAGE_ANCHOR,
              110 : DRM_IMAGE_LIBRARY,
              111 : DRM_IMAGE_MAPPING_FUNCTION,
              112 : DRM_IN_OUT,
              113 : DRM_INDEX_LOD_DATA,
              114 : DRM_INFINITE_LIGHT,
              115 : DRM_INLINE_COLOUR,
              116 : DRM_INTERFACE_TEMPLATE,
              117 : DRM_INTERVAL_AXIS,
              118 : DRM_IRREGULAR_AXIS,
              119 : DRM_KEYWORDS,