Simple implementation of Part21 in the Japanese construction industry

1
Simple implementation of Part21 in the Japanese
construction industry

• Minoru Akiyama
• Director, Standard Department,
• Japan Construction Information Center

2
Contents

• Introduction of Japanese standard for CAD data
  exchange in the construction sector
• SXF(P21) and SXF(SFC)
• Current situation of e-Delivery
• P21 and SFC
• national government and local governments
• Future activities
• confirmation of complete compatibility between
  P21 and SFC

3
Introduction of Japanese standard for CAD data
exchange in the construction sector
4
Background

• Public works in Japan
• Design and construction are executed as
  independent work by separate contracts.
• Contract company is selected through competitive
  tendering.
• Documents and drawings are required to be
  delivered in digital form (e-Delivery).
• e-Delivery CAD data format (SXF) is determined
  and maintained in the Construction Information
  Standard Committee (CISC) as software independent
  standard format.
• SXF is adopted in Construction CALS/EC.
• SXF is adopted almost 100 by the MLIT(Ministry
  of Land, Infrastructure and Transport Japan) as
  e-Delivery CAD data format.

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What is SXF?

• SXF(SCADEC data eXchange Format)
• ?SCADEC Standard for CAD data Exchange
  Consortium
• SXF is CAD software independent standard format.
• There exist two types of SXF physical format
• SXF(P21) SXF(SFC)
• SXF(P21) specification is based on ISO10303
  (STEP) AP202
• SXF(SFC) is almost compatible to SXF(P21) in
  lighter specification.
• Purposes and characteristics
• Interchange format between different phases and
  different sectors
• Design ? Construction ? Maintenance
• Engineering consultant ? Construction firms
• Long term stability
• Openness of specification

6
History of SXF

• 19992000
• Standard for CAD data Exchange Consortium (-
  SCADEC -)
• 37 organizations and 201 companies participated
  in the consortium.
• JACIC is a secretariat for the consortium.
• Specification of SXF level 2 was determined.
• 2002
• MLIT has adopted SXF(P21) as a standard CAD
  format for e-Delivery.
• 2005
• Local governments start to adopt CALS/EC for all
  public works.
• SXF(P21) SXF(SFC)

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SXF Development Levels
To satisfy that drawing image is reproduced
accurately on screen (and paper).
Level1

To satisfy that 2-dimensional CAD data is
completely exchanged among various CAD software,
thus satisfies the requirements for e-Delivery
Level2
completed
To satisfy that 3-dimensional geometric feature
is completely exchanged.
Level3
To satisfy that product model data is exchanged
among CAD and related software including GIS and
construction cost estimation.
Level4
8
SXF Specification
SXF Specification
Main
Outline part Specification of SXF(P21)
part Feature specification part Common property
set part
Appendix
Specification of SXF(SFC) part Attribute addition
mechanism part Common property set part
Implementation rule
SXF software implementation rule
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Available Tools for SXF files

• ? SXF Common Library
• - For the use of CAD software vender
• - Module library to be referred in CAD
  software
• ? SXF Browser
• - For the use of e-Delivery recipients
• - Viewing/printing tool of SXF files
• Download site
• (http//www.cad.jacic.or.jp/) Japanese
  versions only

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SXF Browser
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Two types of SXF physical file

• ? SXF(P21) - Formal Format
• (Compliant to STEP standard) - Large data
  volume - Long I/O time
• - Official format for e-delivery of national
  government
• ? SXF(SFC)
• - Simple Format
• (Not compliant to STEP standard) - Small
  data volume - Short I/O time
• - Mainly used for e-Delivery format in
  local-government

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Example of description
Example of describe a line data
SXF(P21)
P21
Line
SXF(SFC)
SFC
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Quality evaluation of software for SXF

• Open CAD Format Council (OCF)
• OCF issues official guarantee that the CAD
  software conform to SXF specification.
• (OCF authorization)
• List of All CAD software, which has got official
  guarantee from OCF, is shown on OCF homepage.

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Current situation of e-Delivery
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Spreading conditions of SXF (Number of CAD
software in SXF)
????? SXF(P21)? ??
Starting to be used to the instruction of
construction completion drawings etc
Adopted SXF(P21)
????? ????? ??
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Dissemination Status of SXF(P21) SXF(SFC)-
Local governments
(Jun. 2007)

• If there is SXF(P21) only, some local governments
  might hesitate to adopt SXF.
• SXF(SFC) has contributed to promote SXF to be
  adopted in e-Delivery

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Future activities
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Promotion of SXF

• Shorten I/O time
• Improvement of performance of common library
• Secure complete interchangeability
• Establishment of authorization mechanism
• Determination of drawing rule
• Develop and improve tools
• Development of direct converter of P21 and SFC

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Two targets of SXF development
SXF Level 2 2D drawing data with property set
SXF Level 4 sharing of product model data
20
Thank you
Japan Construction Information Center JACIC
http//www.cals.jacic.or.jphttp//www.cad.jacic.o
r.jp