Graphical Hotspot Definition

1

• Graphical Hotspot Definition
• A Common ATA/AECMA Approach
• Presentation at XML Europe 99
• 28 April 1999
• Granada / Spain

2

• Speakers
• David W. Cruikshank
• Associate Technical Fellow
• Co-chair ATA GWG
• Chief Technical Officer, CGM Open Consortium
• Peter Zimmermann
• Chief Advisor for IT
• Member AECMA EPWG
• Observer, CGM Open Consortium

3

• Agenda
• Introduction
• Background
• ATA and WebCGM profiles
• Concepts
• Examples
• Potential future extensions
• Conclusion

4

• Definitions
• Graphical primitive basic drawing element
  defining the geometry
• Graphics metafile CGM picture composed of
  graphical primitives and their associated
  attributes
• Graphical object addressable logical unit within
  a picture (realized by CGM V4 APS)
• Graphical hotspot graphical object participating
  in a link (XLink resource)
• XML companion file non-graphical meta-data of
  graphical objects
• XLink file linking elements and hotspot
  definitions (XLink locators)

5

• Background
• ATA GWG has been working on specifications for
  intelligent graphics since 1989
• Intelligent graphics functional spec (IGFUNQREQ)
  published in 1993
• Graphics exchange spec (GREXCHANGE) mainly CGM
  V3 profile
• Intelligent graphics exchange spec (IGEXCHANGE)
  CGM V4 profile
• Intelligent graphics structure model expressed as
  SGML DTD fragment

6

• ATA and WebCGM profiles
• CGM Open consortium founded in 1998
• WebCGM profile developed, W3C REC since January
  1999
• WebCGM profile
• based on ATA GREXCHANGE profile
• subset of ATA CGM elements
• superset of ATA linking functionality for web
  addressing
• WebCGM intelligent graphics model

7
ATA Realization
A
SEE
igsheet
2 SPACERS
1 IGNITER BOSS
locator
detail A
detail B
para
3 KEYWASHER
2 CLASSIFIED
SPACERS
IGNITER PLUG
B
SEE
(AMM-74-21-02/401)
para
para
3 KEY WASHER
DIMENSION A
1 IGNITER
BOSS
refaps
A
refaps
refint
DIMENSION C
CLASSIFIED SPACERS
B
G-09435 (1098)
G-09574 (1098)
Igniter Plug Boss Installation
Figure 401
28 April 1999 / Page 7
Peter.Zimmermann_at_m.dasa.de
david.w.cruikshank_at_boeing.com
8
WebCGM Realization
A
SEE
picbody
2 SPACERS
grobject
1 IGNITER BOSS
grobject
grobject
para
3 KEYWASHER
2 CLASSIFIED
SPACERS
IGNITER PLUG
B
SEE
(AMM-74-21-02/401)
para
para
3 KEY WASHER
DIMENSION A
1 IGNITER
BOSS
A
subpara
subpara
DIMENSION C
CLASSIFIED SPACERS
B
G-09435 (1098)
G-09574 (1098)
Igniter Plug Boss Installation
Figure 401
9

• Concepts
• Requirements
• Graphics ideally shall contain only graphical
  information, because
• Non-graphical information (meta-data) easier to
  maintain in XML
• Decoupling of data meta-data is more flexible
• Query functions, navigation, and data analysis
  easier to implement
• Logical structure within graphics must be exposed
  for reuse of graphical objects
• Graphical objects belonging to different graphics
  can participate in one link
• A graphical object may participate in more than
  one link (different behavior)
• Multidirectional links within a graphic, between
  graphics, and between graphics and text shall be
  possible.

10

• Concepts (contd.)
• Outline

XML
CGM
XML Comp.
XML
grobject
Hotspot Definitions Linking Elements
Sheet 1
CGM
XML
XML Companion
Sheet 2
Documents
Figure
11

• Concepts (contd.)
• Adressing Graphical Objects
• Application Structures
• Content model of graphical object (conceptually
  expressed as an XML DTD fragment)
• lt!ELEMENT grobject (grobject gdata) gt
• lt!ATTLIST grobject
• id ID REQUIRED
• region CDATA IMPLIED gt
• lt!ELEMENT gdata EMPTY gt
• XPointers
• Basic form of address chosen is a URI (Uniform
  Resource Identifier)
• Most important URI form today is an extended URL
  (Uniform Resource Locator)
• Example for addressing a CGM file on the web
• http//www.boeing.com/cgm/atacgm4.cgm
• Example for addressing a graphical object with id
  grobj01 within this CGM file
• http//www.boeing.com/cgm/atacgm4.xmlid(grobj01)

12

• Concepts (contd.)
• The XML Companion File (DTD fragment)
• lt!ELEMENT graphic (grobject) gt
• lt!ATTLIST graphic
• graphicid ENTITY REQUIRED
• linkURI CDATA REQUIRED gt
• lt!ELEMENT grobject (gdata) gt
• lt!ATTLIST grobject
• id ID REQUIRED
• type CDATA IMPLIED
• name CDATA IMPLIED
• descript CDATA IMPLIED gt
• lt!ELEMENT gdata EMPTY gt

13

• Concepts (contd.)
• Graphical hotspots
• lt!ELEMENT hspot EMPTY gt
• lt!ATTLIST hspot
• xmllink CDATA FIXED locator"
• href CDATA REQUIRED
• refgraphic ENTITY IMPLIED
• role CDATA IMPLIED title CDATA
  IMPLIED show (embed replace new)
  new" actuate (auto user) user"
• behavior CDATA IMPLIED gt

14

• Concepts (contd.)
• The Linking Element
• lt!ELEMENT hsplink (hspot) gt
• lt!ATTLIST hsplink
• xmllink CDATA FIXED extended
• inline (true false) false
• role CDATA IMPLIED
• title CDATA IMPLIED show (embed
  replace new) new" actuate (auto user)
  user"
• behavior CDATA IMPLIED gt

15

• Bidirectional link between text and graphic -
  Example
• CGM filename atacgm1.cgm
• XML companion file (atacgm1.xml)
• ltgraphic graphicidGNBR01 linkURIatacgm1.cgm
  gt
• ltgrobject idgrobj01 namepart1gtlt/grobjectgtlt/g
  raphicgt
• XML text file (atatext1.xml)
• ...ltpnr idrefpart1gtPart1lt/pnrgt is used to...
• Xlink file (hsplink1.xml)
• lthsplink roletext-hspot behaviorhighlightgt
• lthspot hrefid(grobj01) refgraphicGNBR01
  titlePart No. 1gtlt/hspotgt
• lthspot hrefatatext1.xmlid(refpart1)gtlt/hspotgtlt
  /hsplinkgt
• or
• lthsplink roletext-hspot behaviorhighlightgt
  
• lthspot hrefatacgm1.xmlid(grobj01)
  titlePart No. 1gtlt/hspotgt
• lthspot hrefatatext1.xmlid(refpart1)gtlt/hspotgtlt
  /hsplinkgt

16

• Bidirectional link between text and graphic -
  Example(contd.)

lthsplink roletext-hspot behaviorhighlightgt
lthspot hrefid(grobj01) refgraphicGNBR01
titlePart No. 1gt lt/hspotgt lthspot
hrefatatext1.xml id(refpart1)gt lt/hspotgt lt/hsp
linkgt
ltgraphic graphicidGNBR01 linkURIatacgm1.cgmgt
ltgrobject idgrobj01 namepart1gt lt/grobjectgt
lt/graphicgt
Part No. 1
...ltpnr idrefpart1gtPart1lt/pnrgt is used to...
CGM file (atacgm1.cgm)
XML Companion (atacgm1.xml)
XML Link file (hsplink1.xml)
XML Document (atatext1.xml)
Graphic-related info
17

• Bidirectional link between two graphical objects
  in one graphic
• CGM filename atacgm1.cgm
• XML companion file (atacgm1.xml)
• ltgraphic graphicidGNBR01 linkURIatacgm1.cgm
  gt
• ltgrobject idgrobj01 namepart1gtlt/grobjectgt
• ltgrobject idgrobj02 namepart2gtlt/grobjectgtlt/
  graphicgt
• Xlink file (hsplink1.xml)
• lthsplink rolehspot-hspot showembed
  behaviorhighlightgt
• lthspot hrefid(grobj01) refgraphicGNBR01
  titlePart No. 1gt
• lt/hspotgt
• lthspot hrefatacgm1.xmlid(grobj02)
  titlePart No. 2gt
• lt/hspotgtlt/hsplinkgt

18

• Multidirectional link between text and graphic
• CGM filenames atacgm1.cgm, atacgm2.cgm
• XML companion file 1 (atacgm1.xml)
• ltgraphic graphicidGNBR01 linkURIatacgm1.cgm
  gt
• ltgrobject idgrobj01 namepart1gtlt/grobjectgtlt/
  graphicgt
• XML companion file 2 (atacgm2.xml)
• ltgraphic graphicidGNBR02 linkURIatacgm2.cgm
  gt
• ltgrobject idgrobj01 namepart1gtlt/grobjectgtlt/
  graphicgt
• XML text file (atatext1.xml)
• ...ltpnr idrefpart1gtPart1lt/pnrgt is used to...
• Xlink file (hsplink2.xml)
• lthsplink roletext-hspotsgt
• lthspot hrefatacgm1.xmlid(grobj01)
  titlePart No. 1gtlt/hspotgt
• lthspot hrefid(grobj01) refgraphicGNBR02
  titlePart No. 1gtlt/hspotgt
• lthspot hrefatatext1.xmlid(refpart1)gtlt/hspotgtlt
  /hsplinkgt

19

• Potential future extensions
• Investigate application/extension of the DOM
  (Document Object Model)
• Free graphics from textual components
  (annotations)
• Links to and from resources in other multimedia
  formats such as video/audio, animations, 3D
  (VRML), and even simulations.
• Establish links between authoring/illustration
  system (used-on lists)
• Establish link to enterprise PDM system (used-on
  lists for parts)

20

• Conclusion
• Definition of generic element anchor within
  text DTDs is advised
• XML companion file only a first attempt to
  integrate XML/CGM
• More detail work necessary in the areas of
• link management
• link traversal
• user interfaces
• ATA GWG will work with this concept to enhance
  the ATA intelligent graphics model.