A. Acknowledgements

In addition to the listed authors of this specification, the following individuals have contributed significantly to the present WebCGM specification:

Forrest Carpenter, System Development Inc.
Franck Duluc, Airbus
Stuart Galt, The Boeing Company
Ulrich Laesche, Ematek Informatik GMBH
Don Larson, Larson Software Technology
Kevin O'Kane, Auto-trol Technology
Robert Orosz, Auto-trol Technology
Andrew Moorhouse, UK Ministry of Defence
Dieter Weidenbrueck, ITEDO

The following individuals made significant contributions to WebCGM 1.0:

Maryse Da-Ponte, Airbus
Bruce Garner, Analyst/Consultant
Alan Hester, Xerox Corporation
Bob Hopgood, CCLRC
Chris Lilley, W3C
Brad Powell, Zeh Graphic Systems
Dave Rahnis, Bentley Systems
Lynne Rosenthal, NIST
John Gebhardt, Intercap Graphics Systems
Roy Platon, CCLRC
Ty Bartosh, Jeppesen Inc.

A. What's new in WebCGM 2

This section is informative (non-normative).

WebCGM DOM. A major functional addition is a limited WebCGM Document Object Model (DOM), carefully targeted at the WebCGM 2.0 requirements.
WebCGM XCF. The second major functional addition is the definition of a standard XML Companion File for use by WebCGM (and related) applications, closely integrated with WebCGM DOM.
Event model. As an adjunct to the DOM definition, a more detailed event model has been specified, allowing definition and attachment of user event handlers to objects, and specifying how "pick" events are handled in a backward compatible way to WebCGM 1.0.
Complementing the event model, a new param sub-element is added to the OBJECT element, to allow handling of onload events.
Single picture. Whereas ISO CGM:1999 allows multiple independent pictures in a metafile, and WebCGM 1.0 originally did, multiple pictures were deemed not amongst the requirements for WebCGM. To simplify WebCGM, they were deprecated in WebCGM 1.0 2nd Release, and are now removed from WebCGM 2.0.
Fragment syntax. Small changes to allowable values, in order to embody the single-picture rule, but the overall structure of the fragment is unchanged for backward compatibility.
Fragment syntax and xcfterm. It is now possible in the link fragment to specify to load-and-apply an XML companion file before first display of the graphics of a targeted picture.
More object behaviors. The set of object behaviors that can be included in the link fragment syntax has been expanded to give much more user control. A set of behaviors is built from EBNF syntax, by combinations of an orthogonal navigation term and highlighting term. The 3 behaviors of WebCGM 1.0 are deprecated.
Grnode. WebCGM 2.0 defines a purely graphical grouping mechanism, "graphical node", which groups graphical primitives as an Application Structure, but disallows the attributes or properties that associate intelligence with objects.
New APS attributes. WebCGM defines new APS attributes of type 'visibility' and 'interactivity' that may be applied to most object (APS) types.
Style Properties. For use in DOM and XCF, WebCGM 2.0 defines a set of Style Properties -- text color, stroke weight, etc -- that transiently (for the duration of a DOM or viewing session) override the corresponding CGM attributes for targeted picture and APS nodes.
Obsolete features. A number of previously deprecated WebCGM 1.0 features are made obsolete (removed from WebCGM 2.0).
Deprecated features. A number WebCGM 1.0 features are deprecated in WebCGM 2.0 (may be removed in a future revision).
Symbol Libraries. This capability was in WebCGM 1.0, but was removed from WebCGM 2.0 because of lack of interest (POLYSYMBOL, several SYMBOL LIBRARY elements, some registered ESCAPEs, etc).
2.0 and has added some graphical items that were deferred from WebCGM 1.0 (for expedience)
- NUBS and NURBS
- clipping to regions other than rectangles
- increased sizes for Cell Array and Tile Array elements
- Auxiliary Colour and Transparency
- text-on-path (i.e., text layout along arbitrary paths)
- increased sizes for Closed Figure elements

B. Glossary

API, Application Programming Interface: An Application Programming Interface (API) is a set of functions or methods used to access some functionality.
Application Structure, APS: The CGM structure for grouping other elements and assigning them a unique identifier, a type, and attaching attributes. WebCGM contains five valid APS types: grobject, layer, para, subpara, grnode.
APS Attribute, Application Structure Attribute: The CGM element that is used to define and associate an attribute with an APS. WebCGM contains ten valid APS Attribute types: region, viewcontext, linkuri, layername, layerdesc, screentip, name, content, visibility, interactivity.
Cascading profile: A method by which closely related profiles can be expressed efficiently, by only enumerating the differences between a given profile and a base profile such as WebCGM.
CGM, Computer Graphics Metafile: ISO/IEC standard 8632:1999 (CGM:1999), CGM is a metafile format consisting of composite raster and scalable vector graphics information.
DOM, Document Object Model: A Document Object Model is a platform- and language-neutral interface that allows programs and scripts to dynamically access and manipulate the content, structure and style of documents. WebCGM defines a DOM of limited scope, allowing discovery and navigation of the WebCGM structure tree, transient manipulation of styles and standardized metadata, and discovery and manipulation of application-specific metadata. The WebCGM DOM is based upon and borrows from the principles the W3C DOM Level 2 and DOM Level 3 Recommendations.
EBNF, Extended Bauer Normal Form: A formal specification technique used in WebCGM to express pieces of grammar and syntax such as the URI fragment syntax.
fragment (URI fragment): As standardized in RFC 3986, the fragment is a part of a URI that is separated from the path/file name by a "#" character, and provides information that is reserved for processing by agents that are invoked by the browser to handle the resource information type of the URI. WebCGM standardizes the syntax and semantics of a URI fragment, for transmitting object and picture selection and behavior information to WebCGM viewers.
handler, event handler: An event handler is a method called by the WebCGM DOM implementation whenever a specified event occurs. Users register the event types they are interested in by calling the addEventListener() method of the WebCGMMetafile object.
host application: The user agent, typically is a script that controls the behavior of a web page. In the context of WebCGM the host application controls the behavior of the WebCGM renderer through the DOM.
host document: The web page, contains a combination of both HTML and WebCGM content.
host environment: The combination of the host application and the host document
inheritance: The determination of values of APS Attributes and Style Properties for objects in the WebCGM hierarchical object tree, when all aspects have not been explicitly specified for all objects in the tree. WebCGM defines an inheritance model that is closely based on CSS (Cascading Style Sheets, a W3C Recommendation).
interactive region: the effective geometric region for the purposes of all interactive cursor and mouse operations, such as picking and mouseover. By default, the drawn graphical primitives of the object define the interactive region. For filled-area primitives this includes: the edge, if edge visibility is 'on'; the interior, if the interior style is other than 'empty' or 'hollow'; and, the boundary, for interior style 'hollow'. For all graphical primitive types, drawn graphical primitives exclude any that are fully transparent (so a fully transparent object is equivalent to an empty object, for purposes of interactive region definition). If the object contains a 'region' APS Attribute, then that region area is the interactive region.
listener, event listener: The event listener specifies the interface via which users register event handlers with the WebCGM DOM implementation. This interface consists of a single method, handleEvent(), which the WebCGM DOM implementation calls whenever specified events occur. Users pass WebCGMEventListener objects as arguments to the addEventListener() method of the WebCGMMetafile object to register a specific event handler with the WebCGM DOM implementation.
metadata: Non graphical information contained within or associated with standard graphical files, in WebCGM metadata supports such ancilliary functions as hierarchical picture structuring, object identification and navigation, and association of application-specific non-graphical data with graphical objects.
metafile: A mechanism for retraining and transporting graphical data and control information, containing a device independent description of one or more pictures.
namespace, NS: A method devised and standardized by the XML Namespaces standard, namespace provides a way to distinguish to which specification and grammar elements and attributes belong, when information from distinct XML languages is mixed in the same document. WebCGM uses namespaces to separate standardized WebCGM XCF elements and attributes from embedded and intermingled application-specific metadata.
Normalized Device Coordinates, NVDC: The coordinate system that is used to communicate coordinate data through the WebCGM DOM, NVDC is VDC normalized so that the origin is lower-left and units are millimeters.
object: An Application Structure or Picture in a WebCGM.
object behavior: One of a set of (thirteen) ways in which the view of an object or collection of objects is presented following the execution of a hyperlink to the object(s). WebCGM standardizes a number of objects that give complete control over the zoom, pan, and highlight aspects of the view.
picture behavior: One of a set of ways in which the view of a picture (CGM) or document (HTML) is handled following the execution of a hyperlink to the content. Based on the 'target' attribute of the HTML 'a' tag, picture behaviors allow the specification of the new view to occur in a new window, to overwrite the whole contents of the source window, to overwrite the parent window, etc.
PPF, Profile Proforma: A method of expressing profiles standardized in CGM:1999 (clause 9), the PPF presents a profile as a single table covering all aspects of the CGM standard, with a reference column (enumerating a Model Profile or other base profile), and a column to define the target profile by comparison to the reference column.
Style Property: A graphical attributes that may be applied and manipulated at the APS or picture level, transiently, by WebCGM DOM and WebCGM XCF. WebCGM 2.0 defines nine style properties.
target rectangle: A rectangular region around the target object(s) that is used for the application of object behaviors following hyperlink execution. The target region is defined by APS Attributes and/or target geometry, and for example provides the area to be encompassed by a zoomed view.
WDOM, WebCGM DOM: The WebCGM Document Object Model, this terminology is used when it is needed to unambiguously distinguish the WebCGM DOM from the generalized W3C DOM specifications.
XCF, XML Companion File: An XML file format defined by WebCGM, that can be used to externalize metadata from WebCGM instances and bind it to objects in the metafile.

C. Change Log

This section is informative (non-normative).

Changes since OASIS-published first Committee Draft:

---20051027 candidate CS text includes all of below changes---
alphabetize glossary (App.B)
integrated BB WebCGMNode example (5.7.4)
revised 3.2.2.3 URI stuff to point to 3.1.1.3.
rewrote 3.1.1.4 to clarify URI-escaping, when to apply and when not, and add examples.
switched to OASIS cover page, OASIS CSS, and made specialized WebCGM20.css for unique styles (All).
integrated SG WebCGMMetafile example (5.7.3)
removed normative Conformance, References, ECMAScript from Appendixes and made them Ch.7, Ch.8, Ch.9
integrated SG WebCGMNodeList example (5.7.7)
clarified return values of attributes on WebCGMMetafile, if no WebCGM document is open in viewer (5.7.2 & 5.7.3).
fixed typos in XCF DTD (4.4).
minimal changes to examples 1-7 to make them 2.0-legal, "preferred", and current with new 2.0 behaviors (3.1.3).
integrate all new figures (Ch.2, Ch.3, Ch.5)
add descriptions of 'halign' and 'valign' to PARAMs of OBJECT element (3.4)
reformat all of interface subsections (5.7.1 - 5.7.10)
integrate SG WebCGMException example (5.7.1)
fully integrate BB WebCGMPicture example (5.7.5)
clarify (3.1.1.4) that WebCGM content does support pre-escaped and post-escaped URIs;
replace (incomplete) repetition of URI rules in 'linkuri' (3.2.2.3) with pointer to 3.1.1.4.
fix Ch.6 T.15.9 to refer to normative content model snippets of 3.2.1 subsections (3.3 DTD is not normative in 2.0).
in Ch.6 T.15.9 and 3.2.1, add references to fragment objid production of 3.1.1.3, for normative rules on APS id in WebCGM content.
apply DC's Ch.6 MP corrections, all editorial (multiple Ch.6 subsections).
remove meaningless NO_MOD_ALLOWED_ERR exception from setAttributeNS (5.7.4).
---20051007 editors draft includes all of below changes---
(partially) integrate BB WebCGMPicture example (5.7.5)
apply RO's Ch.6 MP corrections, i.e., from the .pdf attachment, all of which were editorial (affects all Ch.6 subsections).
apply UL's Ch.3 editorial comments, i.e., from the .doc attachment.
reword #1 of "processing namespace attributes" (5.3) -- same net effect, but remove the vague implication of error.
clarify 'move' operation in VDC Extent boundary case (3.1.2.4.3).
3.2.2.3 Example revised to emphasize preferred form and de-emphasize discouraged form.
delete "para, subpara" from "Viewer behavior" description of 3.2.1.5, since their normative content models don't allow grnode children.
regex production for hex digits in color sub-type is [0-9a-fA-F] -- case insensitive, per the section's examples (5.3).
DL Ch.5 editorial comments implemented (as amended by LH suggestions).
clarify wording of 1st bullet, item #4, "processing child elements" list (5.3).
reiterate/clarify up front that "picture behaviors" collectively addresses CGM pictures and HTML documents/pages (3.1.2.2).
reiterate "picture behaviors" collective concept also in footnote to informative table of 3.1.2.7.
explicitly clarify that xcfurl can be absolute or relative, and the latter is resolved relative to the companion WebCGM instance (3.1.1.5)
fix (WebCGM 1.0) loophole that would have allowed format effector-whitespace chars in 'name' (3.1.1.3).
clarify that WebCGM 'target' picture behavior is based upon / derived from HTML 4.01, not identical to it (3.1.1.3).
copied definition of "format effectors" from CGM:1999 into T.14.5.
API added to glossary (Appendix D)
fix editorial errors in object behaviors table (3.1.2.4.1) and object behaviors default (3.1.2.4.1)
viewer handling of old (deprecated) object behaviors more precisely defined (3.1.2.4.1, A.2.2).
clarify language about what a URI fragment is (3.1.1.1)
clarify language of optional / required attributes; clarify language about private metadata (2.3.4)
revise 2.3.4 to remove "optional" from the bullets and express it before the list, along with "'layername' is required."
replace "WebCGM viewers" w/ "WebCGM-supporting applications" in 1.1.
remove and integrate last pgph of Abstract into rewritten 1st pgph (plus bullet list) of 1.3.
fix editorial error in IDL (5.7.7) and ECMAScript (App.F) -- newItem of WebCGMNodeList::appendItem is type WebCGMNode, as stated in the text, not (nonsensical) WebCGMString.
---2nd CD text---20050909 text includes all of below changes---
added OASIS Logo and "Notices" to cover page.
added "A.5 Normativity", to explain normative/informative content and conformance requirements.
added RFC 2119 to normative references (B.1).
added exception NO_MODIFICATION_ALLOWED_ERR to setAppStructureAttr, removeAppStructureAttr (5.7.6).
added legal-character reference to WebCGMNode.setAppStructureNS(), for exception determination (5.7.4).
added definitions (Appendix D) of event handler, event listener, host application, host document, host environment.
change A.4.2 (profile extensions rules) to non-normative, edit to reflect resolved issues and cascading policy.
add Null return value discussion to Basic Data Types (5.5.2.1), link all Ch.5 "null" return specifications to it.
WebCGMPicture (5.7.5) .getAppStructureById (fix), getAppStructuresByName (ok): make consistent about "null" return.
WebCGMNode (5.7.4) .childnodes (fix), .attributes (ok), .getElementsByTagNameNS (fix): make consistent about "null" return.
5.7.10, fix 2nd bullet list to reflect that event handlers are only attached to the WebCGMMetafile interface.
add "empty string" discussion to Basic Data Types (5.5.2.2), link all subsequent Ch.5 occurrences of "empty string" to it.
change default namespace to "#FIXED" in XCF (4.3.3 & 4.4).
fixed getAppStructureById for null return (was: returns empty list) (5.7.5).
changed 'null' to 'empty string' in namespaceURI, prefix, localName attributes of WebCGMNode interface (5.7.4).
added ATTR_NODE to WebCGMNode.namespaceURI applicability (5.7.4).
Clarify resolution of relative URIs for applyCompanionFile, improve wording and linking of description (5.7.5).
In 3.2.1.5, grnode, clarify "Viewer behavior" wording about interactive, direct child, etc.
---20050804 text includes all of below changes---
first cut at definitions of majority of terms in the glossary (Appendix D).
added XCF webcgm/xmlns examples, and clarified that xmlns must be present on 'webcgm' (4.3.3).
reference DOM basic data types from XCF "Data types and encodings" (4.3.1).
wrote comprehensive "Basic data types" section (5.5).
changed "deprecated" to "discouraged" in 'linkuri' (to align past intent with new "deprecated" definition) (3.2.2.3).
added correct/incorrect usage examples to getWebCGMDocument.src description (5.7.3)
added local TOCs to chapters 1 and 6.
added extensibility rules for profiles to Conformance clause (appendix A.4.1).
fixed example 5.1b to remove private graphical stuff (5.3).
added extensibility rules for implementations to Conformance clause (appendix A.4.2).
added precise definition of "deprecated" to conformance clause (A.2)
added local TOC to start of Ch.2
---20050719 editors draft includes all of below changes---
moved Ch.4 "Data types & encodings" before the descriptions of the XCF elements (4.3.1).
added clarifying example of 3rd parameter usage to 'linkuri' (3.2.2.3).
added explanation to Fundamental Interfaces (5.7) of picture-as-root.
added explanation to WebCGMAttr (5.7.8) about parentNode, sibling nodes, etc (null).
added first cut of ECMAScript binding (appendix F).
mark example 5.1b for replacement (it's more or less invalidated by past couple months developments) (5.3).
replace character-height SP with the text-size SP (5.7.5, 4.3.2, 4.4).
clarified WebCGMNode.attributes about apsid and pictid, added table of NodeType / Attributes (5.7.4).
added getAppName() and getAppVersion() to GetWebCGMDocument interface (5.7.2).
replaced enumeration of objBehaviors in frag. EBNF with the 3-line generating EBNF (3.1.1.2).
moved behaviors-summary table to new 3.1.1.7, linked to rules elsewhere.
added example in 3.1.1.5 of resolution of relative URI in xcfterm of fragment.
fixed the NO_MODIFICATION_ALLOWED_ERR exception description on WebCGMNode:Attr (5.7.8).
correct FILE_INCOMPATIBILITY_ERR to FILE_INVALID_ERR in WebCGMException IDL (5.7.1).
removed deprecation warnings about sRGB (2.2.2, 2.5.3, 6.5, A.2).
change visibility to pictureVisibility on 'webcgm' XCF (4.3.3), change setPictVisibility() to setPictureVisibility (5.7.5).
remove "must navigate first, then highlight", from obj behaviors (3.1.2.4)
remove hasAttributesNS() from WebCGMNode interface; fix explanation of attributes, hasAttributes (5.7.4).
---20050708 editors draft includes all of below changes---
added summary table to 3.1.2, picBehavior & objBehavior rules for H2C, C2H, C2C, DOM, XCF.
added clearHighlight special form to obj-selection-keywords and obj-behaviors sections (3.1.1.2, 3.1.2.4.1).
updated fragment EBNF for all changes to obj. behaviors (3.1.1.2).
added 'visibility' to XCF 'webCGM' element (4.3.3).
finalize wording of parentNode attribute on WebCGMNode interface (5.7.4).
finalize format of metafileDescription attribute on WebCGMMetafile interface (5.7.3).
finalize description of 'src' attribute on WebCGMMetafile interface (5.7.3).
remove clearStyleProperty method from WebCGMPicture interface, explain that "inherit" has same effect (5.7.5).
text-font included in Style Properties of 5.7.5 and XCF; explain initial value "metafile".
clarify that 'attributes' and hasAttributes() on WebCGMNode include the apsid parameter of BegAps (5.7.4).
added informative note to PPF (Ch.6) T.14.4 and T.14.5 that Unicode octet strings are "big-endian".
added 'onload' param sub-element to OBJECT (3.4).
in SP definitions (5.7.5), add inheritance-related specs of Computed Value, "Inherited:yes", and "inherit" value.
in SP definitions (5.7.5) clarify "replacement mode" (not accumulate), and "order counts".
prohibit intensity plus {fill-color | stroke-color | text color} on same XCF element (4.3.2).
finished editing obj. Behaviors sections (3.1.2.3, 3.1.2.4).
added %styleProperties; to other XCF elements, and fixed the extension entity definitions on all of them (4.3, 4.4).
added "xmlns CDATA #implied" to ATTLIST of XCF 'webcgm' element (4.3.3, 4.4).
added "Namespaces in XML" to normative references (B.1).
UTF-8 & UTF-16 corrections made to PPF (ch.6, T.16.14).
setPictVisibility() added to WebCGMPicture interface (5.7.5).
---20050627 editors draft includes all of below changes---
new 'layer' content picture in Ch.2, to allow empty layers (2.3.5).
started implementing the new object behaviors of the URI fragment, deprecating old (1.0) 3 behaviors (3.1.2.3, 3.1.2.4).
deprecate viewport param element of OBJECT (3.4).
fixed format of example on metafileDescription attribute, defined on WebCGMMetafile interface (5.7.3).
added picBehavior and same-CGM rules to src attribute, defined on WebCGMMetafile interface (5.7.3).
added new draft of DOM ch.5.4, "Inheritance model..."
swapped example 4.1 to be last example (now 4.3), indicated "partial inventory; "full description" is out-of-scope; also fixed the parallel text in Ch.2.
added Ch.4 XCF subsection defining Conforming WebCGM XCF file (4.2.4)
added Ch.4 XCF subsection for Namespace, Public Identifer, System Identifier (4.2.3).
clarified "mostly flat" structure of XCF, add example to illustrate, mention webcgm-Picture root correspondence (4.2.1).
added to 'version' attribute of 'webcgm' element, "every XCF must identify version by 'version' or DTD" (4.3.3).
change "mouse region" to "interactive region" (everywhere, mostly Ch.3 and Appendix D).
added Style Properties to XCF, define styleProperties entity, add to DTD (all 4.3 subsections, 4.4).
restructured XCF (Ch.4) sub-sections.
clarify that _replace picture behavior does not reload CGM, for intra-CGM link within the same picture (3.1.2.2).
clarify in OBJECT (3.4) that the FIXED param elt. only affects viewers' user zoom/pan controls.
in Style Prop. table of Interface WebCGMPicture (5.7.5), stroke-weight and character-height must be > 0.
Added placeholder "ECMAScript binding" appendix (F), per 20050608 telecon.
---20050610 editors draft includes all of below changes---
add local TOC to chapter 3.
annotate "No example this WebCGM version" in 5.4.1.3 "Used Values".
add "not fully transparent" to definition of mouse region, mention also in 5.7.10.
remove 1.0 restriction and allow empty layers in 2.0 (3.2.1.2, 3.3).
convert content model of grobject to EBNF (3.2.1.1).
clarify in 3.2.2.9 (visibility) and 3.2.2.10 (interactivity) that they inherit to/thru grnode, even though they don't apply to it .
fix viewer behavior of grobject (3.2.1.1), to reconcile former items #2,3,4 with event model (5.7.10), by converting them to an example.
clarify (no functional change) viewer behavior for linkuri (3.2.2.3) and screentip (3.2.2.6), to make consistent w/ the event model (5.7.10).
make 3.4 description of <object> element XHTML friendly (lower case, etc).
clarify in 'visibility' (3.2.2.9) and 'interactivity' (3.2.2.10) that they inherit to/through 'grnode' even though they don't apply.
clarified / corrected wording of grnode (3.2.1.5)
added notation definition to 3.1.1.2, and referenced it from 3.2.1.
added introductory text, clarified wording, flagged issues, in object behaviors sections (3.1.2.4).
changed example 3 (3.1.3.4) to avoid deprecated view_context behavior, fixed examples 5,6,7 for 'zoom' default instead of 'highlight', clarified wording (e.g., re. target rectangle) in several examples.
added notation definition before EBNF in 3.1.1.2 (frag. syntax)
added bullet to 3.1.1.3-#3, specifying (char)+ for xcfterm
added 3.1.1.5 about resolving relative URI for xcfurl, link that from 3.1.2.6.
updated RFC 2936 to RFC 3986, Xpointer to REC Xpointer Framework, XML 1.0 2nd Ed to XML 1.0 3rd Ed., HTML 4.0 to HTML 4.01 (throughout the spec).
clarified (in 5.4) those parts of CSS2 inheritance model that don't apply to any WebCGM cases yet.
---20050530 editors draft includes all of below changes---
implemented AM review editorial comments on Overview (Ch.1) (200505?? email)
implemented FC review comments (editorial) on 5.7 (20050524 email)
implemented DL review comments (editorial) on 5.1 - 5.6 (20050506 email)
clarify that all 3 parts of linkuri must be supplied (even if empty) in WebCGMs (3.2.2.3) and DOM (5.5).
moved addEventListener method from WebCGMPicture node (5.7.5) to WebCGMMetafile node (5.7.3).
define "mouse region" in common, for prev. "picking region", 'region' ApsAttr, new events model, etc (3.2.1.1, 3.2.2.1, 5.7.10).
in 5.5 define validChar for Delimited String (by ref to individual APS Attr data rules, plus Char. Repertoire 3.1.1.3)
a Delimited String cannot contain both a QUOTE and an APOSTROPHE within substring data content (5.5).
Delimited String containing a single substring is coded identically to simple string (5.5).
added "inherit" value for 'visibility' and 'interactivity' -- (3.2.2.9, 3.2.2.10, 4.3), 5.7.6.
5.7.5 table: removed Note after it; fixed inaccurate descriptions of all style properties.
5.7.5 table: added Initial Value, add absolute to stroke-weight & character-height
5.7.6, changed 'viewcontext' to simple string, fixed it and 'region' examples (wsp)
renamed "style attribute" to "style property" throughout Ch.5 & Ch.4, including names of methods.
added a subsection to XCF, describing attribute encoding (4.3.1).
readability of Abstract improved, Status updated.
added first-draft terms list for glossary, of DC (Appendix D).
fixed parameters of Example 4.1 consistently with Ch.5 specifications.

CGM Open specification - WebCGM 2.0 - Appendixes

Contents

A. Acknowledgements

A. What's new in WebCGM 2

B. Glossary

C. Change Log