CGM Conformance

Antenna House Formatter V7.4 conforms to ISO/IEC 8632:1999 CGM and W3C WebCGM 2.1 and supports to display CGM images with a newly developed engine. This makes it possible to output high quality CGM images as vectors in the CGM. See also Graphics to learn how to utilize CGM.

Customers must purchase “Antenna House Formatter CGM Option” to render CGM originally. For more details, see also Antenna House website.

The below table shows the implemented CGM elements.

[yes] in the list means that the element is implemented.
[partial] means that the element is partially implemented.
[no] means not implemented.

The ISO8632 and WebCGM columns show the conformance status of the associated element.

[R] means that the element is essential.
[Y] means that the element is permitted.
[N] means that the element should not be implemented.

Class-ID Element Condition Comments / Attributes ISO8632 WebCGM

0-0

NOP

yes

0-1

BEGIN METAFILE

yes

When multiple BEGIN METAFILE elements are included, only the first one is effective.

0-2

END METAFILE

yes

If the element exists after END METAFILE, it is ignored.

0-3

BEGIN PICTURE

yes

With WebCGM, only one from BEGIN PICTURE to END PICTURE can be included in the metafile.

0-4

BEGIN PICTURE BODY

yes

0-5

END PICTURE

yes

0-6

BEGIN SEGMENT

0-7

END SEGMENT

0-8

BEGIN FIGURE

yes

0-9

END FIGURE

yes

0-13

BEGIN PROTECTION REGION

yes

0-14

END PROTECTION REGION

yes

0-15

BEGIN COMPOUND LINE

yes

0-16

END COMPOUND LINE

yes

0-17

BEGIN COMPOUND TEXT PATH

0-18

END COMPOUND TEXT PATH

0-19

BEGIN TILE ARRAY

partial

cell path direction, line progression direction are ignored.

0-20

END TILE ARRAY

yes

0-21

BEGIN APPLICATION STRUCTURE

partial

In WebCGM, the following types are defined. When these types have structural violation or the types are outside the defined one, a warning message will be shown.

layer
grobject
para
subpara
grnode

The semantic interpretation of the type is not performed. The content is evaluated as is. inheritance flag is ignored and considered statelist.
In SVG Output, it is output as <g id="[identifier]" class="[type]">. V7.4MR2

In WebCGM, it is considered to control APPLICATION STRUCTURE dynamically using ECMAScript from HTML. Antenna House Formatter V7.4 doesn't handle such behavior. See also WebCGM Intelligent Content and WebCGM XML Companion File.

0-22

BEGIN APPLICATION STRUCTURE BODY

yes

0-23

END APPLICATION STRUCTURE

yes

1-1

METAFILE VERSION

yes

The version information isn't used.

1-2

METAFILE DESCRIPTION

yes

Behaves as WebCGM when “ProfileId:WebCGM” is specified. However, the setting contents of METAFILE DESCRIPTION swing widely, whether it is WebCGM may not be judged correctly. It's possible to enforce WebCGM by specifying WebCGM with content-type explicitly as follows:

<fo:external-graphic src="sample.cgm" content-type="image/cgm;ProfileId=WebCGM"/>

See also WebCGM Intelligent Content.

1-3

VDC TYPE

yes

1-4

INTEGER PRECISION

yes

1-5

REAL PRECISION

yes

1-6

INDEX PRECISION

yes

1-7

COLOUR PRECISION

yes

1-8

COLOUR INDEX PRECISION

yes

1-9

MAXIMUM COLOUR INDEX

yes

1-10

COLOUR VALUE EXTENT

yes

1-11

METAFILE ELEMENT LIST

partial

Ignored.

1-12

METAFILE DEFAULTS REPLACEMENT

yes

1-13

FONT LIST

yes

1-14

CHARACTER SET LIST

partial

Ignored.

1-15

CHARACTER CODING ANNOUNCER

partial

Ignored.

1-16

NAME PRECISION

yes

1-17

MAXIMUM VDC EXTENT

partial

Ignored.

1-18

SEGMENT PRIORITY EXTENT

1-19

COLOUR MODEL

partial

Supported only for RGB.

1-20

COLOUR CALIBRATION

1-21

FONT PROPERTIES

partial

Only the attributes listed below are evaluated.

font index
font family
posture
weight
proportionate width

1-22

GLYPH MAPPING

1-23

SYMBOL LIBRARY LIST

1-24

PICTURE DIRECTORY

2-1

SCALING MODE

yes

2-2

COLOUR SELECTION MODE

yes

2-3

LINE WIDTH SPECIFICATION MODE

yes

2-4

MARKER SIZE SPECIFICATION MODE

yes

2-5

EDGE WIDTH SPECIFICATION MODE

yes

2-6

VDC EXTENT

yes

2-7

BACKGROUND COLOUR

yes

2-8

DEVICE VIEWPORT

2-9

DEVICE VIEWPORT SPECIFICATION MODE

2-10

DEVICE VIEWPORT MAPPING

2-11

LINE REPRESENTATION

yes

2-12

MARKER REPRESENTATION

yes

2-13

TEXT REPRESENTATION

yes

2-14

FILL REPRESENTATION

yes

2-15

EDGE REPRESENTATION

yes

2-16

INTERIOR STYLE SPECIFICATION MODE

yes

2-17

LINE AND EDGE TYPE DEFINITION

yes

2-18

HATCH STYLE DEFINITION

yes

2-19

GEOMETRIC PATTERN DEFINITION

2-20

APPLICATION STRUCTURE DIRECTORY

3-1

VDC INTEGER PRECISION

yes

3-2

VDC REAL PRECISION

yes

3-3

AUXILIARY COLOUR

yes

3-4

TRANSPARENCY

partial

Reflected on hatch and non-solid line.

3-5

CLIP RECTANGLE

yes

3-6

CLIP INDICATOR

yes

3-7

LINE CLIPPING MODE

partial

Supported only for shape.

3-8

MARKER CLIPPING MODE

partial

Supported only for shape.

3-9

EDGE CLIPPING MODE

partial

Supported only for shape.

3-10

NEW REGION

yes

3-11

SAVE PRIMITIVE CONTEXT

3-12

RESTORE PRIMITIVE CONTEXT

3-17

PROTECTION REGION INDICATOR

yes

When multiple REGION are made effective, adopts REGION that is newly made effective, without adopting the total of these regions as REGION.

3-18

GENERALIZED TEXT PATH MODE

3-19

MITRE LIMIT

yes

3-20

TRANSPARENT CELL COLOUR

partial

Reflected when the compression types are the following:

0.	null background
1.	null foreground
2.	T6
3.	T4 1-dimensional
4.	T4 2-dimensional
5.	bitmap
6.	run length

4-1

POLYLINE

yes

4-2

DISJOINT POLYLINE

yes

4-3

POLYMARKER

yes

4-4

TEXT

yes

4-5

RESTRICTED TEXT

yes

4-6

APPEND TEXT

yes

4-7

POLYGON

yes

4-8

POLYGON SET

yes

4-9

CELL ARRAY

yes

4-10

GENERALIZED DRAWING PRIMITIVE

4-11

RECTANGLE

yes

4-12

CIRCLE

yes

4-13

CIRCULAR ARC 3 POINT

yes

4-14

CIRCULAR ARC 3 POINT CLOSE

yes

4-15

CIRCULAR ARC CENTRE

yes

4-16

CIRCULAR ARC CENTRE CLOSE

yes

4-17

ELLIPSE

yes

4-18

ELLIPTICAL ARC

yes

4-19

ELLIPTICAL ARC CLOSE

yes

4-20

CIRCULAR ARC CENTRE REVERSED

yes

4-21

CONNECTING EDGE

yes

4-22

HYPERBOLIC ARC

yes

Approximated curve is drawn.

4-23

PARABOLIC ARC

yes

4-24

NON-UNIFORM B-SPLINE

yes

Drawn by transforming to non-rational cubic Bézier curves.

4-25

NON-UNIFORM RATIONAL B-SPLINE

yes

Drawn by transforming to non-rational cubic Bézier curves.

4-26

POLYBEZIER

yes

4-27

POLYSYMBOL

4-28

BITONAL TILE

partial

The following compression types are supported.

0.	null background
1.	null foreground
2.	T6
3.	T4 1-dimensional
4.	T4 2-dimensional
5.	bitmap
6.	run length
7.	baseline jpeg
9.	png

4-29 TILE partial v3 Y Y

5-1

LINE BUNDLE INDEX

yes

5-2

LINE TYPE

yes

LINE TYPE=1 to 14 are supported. LINE TYPE=6, 7, 8, 14 are adopted only with POLY LINE. When LINE TYPE=6, 8, and the length of the arrowhead is less than the length of the segment or the width of the arrowhead is less than the width of a line, an arrowhead isn't drawn. When LINE TYPE=7 and a circular diameter is less than the length of the segment or the width of a line, a circle isn't drawn.

5-3

LINE WIDTH

yes

5-4

LINE COLOUR

yes

5-5

MARKER BUNDLE INDEX

yes

5-6

MARKER TYPE

yes

5-7

MARKER SIZE

yes

5-8

MARKER COLOUR

yes

5-9

TEXT BUNDLE INDEX

yes

5-10

TEXT FONT INDEX

yes

5-11

TEXT PRECISION

partial

Ignored.

5-12

CHARACTER EXPANSION FACTOR

yes

5-13

CHARACTER SPACING

yes

5-14

TEXT COLOUR

yes

5-15

CHARACTER HEIGHT

yes

5-16

CHARACTER ORIENTATION

yes

5-17

TEXT PATH

yes

5-18

TEXT ALIGNMENT

yes

5-19

CHARACTER SET INDEX

partial

Ignored.

5-20

ALTERNATE CHARACTER SET INDEX

partial

Ignored.

5-21

FILL BUNDLE INDEX

yes

5-22

INTERIOR STYLE

partial

geometric pattern is not supported.

5-23

FILL COLOUR

yes

5-24

HATCH INDEX

yes

5-25

PATTERN INDEX

yes

5-26

EDGE BUNDLE INDEX

yes

5-27

EDGE TYPE

yes

5-28

EDGE WIDTH

yes

5-29

EDGE COLOUR

yes

5-30

EDGE VISIBILITY

yes

5-31

FILL REFERENCE POINT

yes

5-32

PATTERN TABLE

yes

5-33

PATTERN SIZE

yes

5-34

COLOUR TABLE

yes

5-35

ASPECT SOURCE FLAGS

yes

5-36

PICK IDENTIFIER

5-37

LINE CAP

partial

triangle is not supported.

5-38

LINE JOIN

yes

5-39

LINE TYPE CONTINUATION

partial

Ignored.

5-40

LINE TYPE INITIAL OFFSET

yes

5-41

TEXT SCORE TYPE

5-42

RESTRICTED TEXT TYPE

yes

5-43

INTERPOLATED INTERIOR

partial

triangular is not supported.

5-44

EDGE CAP

partial

triangle is not supported.

5-45

EDGE JOIN

yes

5-46

EDGE TYPE CONTINUATION

partial

Ignored.

5-47

EDGE TYPE INITIAL OFFSET

yes

5-48

SYMBOL LIBRARY INDEX

5-49

SYMBOL COLOUR

5-50

SYMBOL SIZE

5-51

SYMBOL ORIENTATION

6-1

ESCAPE

partial

The following functions are supported. The other functions of ESCAPE element are ignored.

Transparent Cell Colour
Alpha Transparency

7-1

MESSAGE

yes

A message with the error level 1 is outputted.

7-2

APPLICATION DATA

8-1

COPY SEGMENT

8-2

INHERITANCE FILTER

8-3

CLIP INHERITANCE

8-4

SEGMENT TRANSFORMATION

8-5

SEGMENT HIGHLIGHTING

8-6

SEGMENT DISPLAY PRIORITY

8-7

SEGMENT PICK PRIORITY

9-1

APPLICATION STRUCTURE ATTRIBUTE

partial

In WebCGM, the following attributes are defined:

region
viewcontext
linkuri
layername
layerdesc
screentip
name
content
visibility
interactivity

These settings are evaluated, but these are not always used. When visibility is off, its APPLICATION STRUCTURE is not shown.

WebCGM Intelligent Content

The feature of controlling the drawing using a URI fragment is partially supported. For example, specify as follows in FO.

<fo:external-graphic src="sample.cgm#name(targetName,newHighlight)"/>

See also WebCGM Intelligent Content to learn more about the fragment grammar. Antenna House Formatter V7.4 does not support behavior. This is ignored.

When specifying content-type, the parameter can be given as follows:

<fo:external-graphic src="sample.cgm" content-type="image/cgm;Version=4;ProfileId=WebCGM"/>

The evaluated parameters available are Version and ProfileId. These are adopted in preference to the information in METAFILE VERSION, METAFILE DESCRIPTION in the metadata for each.

See also BEGIN APPLICATION STRUCTURE, APPLICATION STRUCTURE ATTRIBUTE to learn more about Application Structure (APS).

WebCGM XML Companion File

Supports WebCGM XML Companion File (XCF) partially. XCF can be specified in FO using the fragment as follows:

<fo:external-graphic src="sample.cgm#xcf(sample.xcf)"/>

It's also available to specify XCF directly as a child element of <fo:external-graphic>.

<fo:external-graphic src="sample.cgm">
 <webcgm xmlns="http://www.cgmopen.org/schema/webcgm/">
  <bindByName apstargetname="hidden-aps" visibility="off"/>
 </webcgm>
</fo:external-graphic>

Antenna House Formatter V7.4 supports the following:

	<wegcgm>	<layer>	<grobj>	<para>	<subpara>	<bindById>	<bindByName>	Comments
id	no
version	no
filename	no
background-color	yes
pictureVisibility	yes
intensity	yes	yes	yes	yes	yes	yes	yes
raster-intensity	yes	yes	yes	yes	yes	yes	yes
text-size	yes	yes	yes	yes	yes	yes	yes	☞ note 1
text-color	yes	yes	yes	yes	yes	yes	yes
text-font	yes	yes	yes	yes	yes	yes	yes
fill-color	yes	yes	yes	yes	yes	yes	yes
fill-offset	yes	yes	yes	yes	yes	yes	yes
stroke-color	yes	yes	yes	yes	yes	yes	yes
stroke-weight	yes	yes	yes	yes	yes	yes	yes
stroke-type	yes	yes	yes	yes	yes	yes	yes
stroke-offset	yes	yes	yes	yes	yes	yes	yes
edge-visibility	yes	yes	yes	yes	yes	yes	yes
interior-style	yes	yes	yes	yes	yes	yes	yes
hatch-index	yes	yes	yes	yes	yes	yes	yes
pattern-index	yes	yes	yes	yes	yes	yes	yes
apsid		yes	yes	yes	yes	yes		☞ note 2
apstargetname							yes	☞ note 3
screentip			no	no	no	no	no
region			no	no	no	no	no
viewcontext			yes	yes	yes	yes	yes
layerdesc						no	no
visibility		yes	yes	yes	yes	yes	yes
interactivity		no	no	no	no	no	no
<linkuri>			no	no	no	no	no

note 1:: Even with RESTRICTED TEXT, text-size is adopted and variabe zooming according to the specified region is not performed.
note 2:: apsid specifies the application structure identifier of BEGIN APPLICATION STRUCTURE.
note 3:: apstargetname specifies the value of the name attribute or the layername attribute of APPLICATION STRUCTURE ATTRIBUTE.

Application Configurable Items

In the CGM specification, the default value of the attribute is sometimes not defined. Application Configurable Items (ACI) in the WebCGM specification specifies such defaults and controls the behavior of CGM. The default value can also be specified in the Option Setting File as well. These are evaluated by the following order.

ACI file specified by the environment variable, WebCGM_ACI_File.
ACI file specified by aci in the Option Setting File.
Contents other than aci in the Option Setting File.
ACI file that has the .aci extension and the file name is the same as CGM file in the directory when CGM is a file.