Towards a Curation and Preservation Architecture for CAD ...€¦ · Towards a Curation and...

Towards a Curation and Preservation

Architecture for CAD Engineering Models

Alex Ball, Lian Ding, Manjula Patel

University of Bath

iPRES 200829 September 2008

Outline

IntroductionIndustrial ContextComputer-aided design (CAD)

Management environments

RRoRIfE

Significant Properties2D Geometry3D GeometryGeometric construction techniquesGeometry-related metadataCompression and identification

Further work

Conclusions

The Product-ServiceParadigm

Computer-aided design(CAD)

I Increased integration withdownstream tools

I Manufacturing (CAM)I Analysis and simulation (CAE)I Enterprise Resource Planning

(ERP)I Customer Relation Management

(CRM)I Supply Chain Management (SCM)

I Increasingly complexrepresentations

I Mostly proprietary, mutuallyincompatible, ephemeral formats

Inside a CAD model

CAD models typically contain:

I geometry

I dimensions and tolerances

I construction history

I ‘features’ – predefinedparts

I more meaningful than‘raw’ geometry

Lightweight formats

Lightweight visualization formats are:

I simpler formats dedicated to a single purpose e.g. designreview)

I approximate or exact geometryI sometimes product manufacturing information

I usually well documented to encourage wide supportI standard formatsI formats with freely available specifications

I supported by free software

I supported on many platforms

I small in file size

Product LifecycleManagement

Product Lifecycle Management (PLM) systems offer thefollowing facilities:

I versioning

I access control

I cross-file linkages

I cross-system linkages

I portals for activities and collaboration

I limited channels for information flow

I no preservation planning tools

J Hunter, S Choudhury. 2006. ‘PANIC: an integrated approach to the preservation ofcomposite digital objects using Semantic Web services.’ International Journal on

Digital Libraries 6(2): 174–183.

M Ferreira, A A Baptista and J C Ramalho. 2006. ‘A Foundation for Automatic DigitalPreservation.’ Ariadne 48. http://www.ariadne.ac.uk/issue48/ferreira-et-al/

PLANETS

A Farquhar, H Hockx-Yu. 2007. ‘Planets: Integrated Services for Digital Preservation.’International Journal of Digital Curation 2(2):88–99.

Desiderata for PLM

I Flexible, modular and consistent approach tocommunicating design information

I Preservation planning:I registry of format characteristicsI registry of format migration servicesI registry of evaluations of preservation actions

I How can we add these?

Lightweight Models with

Multilayered Annotations

I Geometry held in lightweight visualization formats (as wellas the original CAD model)

I Everything else held in one of a number of sets ofannotations layered on top the model

Layering annotations

Different annotationlayers for different

viewpoints (design,manufacture, service)

and for differentsecurity levels(internal, public)

Geometry layer

Workflow

LiMMA tools

NX3 CAD system

X3D lightweight viewer

Adobe Acrobat

LiMMA tools

NX3 CAD system

Adobe Acrobat

LiMMA tools

NX3 CAD system

Adobe Acrobat

RRoRIfE

Registry/Repository of

Representation Information

for Engineering

I Holds information about format characteristics andmigration services

I Uses custom XML format for storage

RRoRIfE

I Searches for formats suitable for a given purpose

I Searches for migration paths suitable for a given purpose

Significant Properties

I Definition: those aspects of a digital object which must bepreserved over time in order for it to remain accessible,usable and meaningful(A Wilson. 2007. InSPECT Significant Properties Report.

AHDS/National Archives.)

I Relative to objectI Relative to purpose

I Working definition for RRoRIfE: those aspects of a digitalobject which any new expression of that object mustexhibit in order to fulfil its intended function while beingfaithful to the original

Types of requirement

I Exact geometry versus approximate geometry

I Construction modelling history

I Geometry-related metadata (tolerances, finishes, etc.)

I Transmission of the model over the Internet

I Persistent identification of (subsets of) geometry

2D Geometry

I Point

I Polyline

I Line

I Conic arc

I Elliptical arc

I Circular Arc

I Open composite

curveI Ellipse

I Circle

I Polygon

I Triangle

I Rectangle

I Square

I NURBS curve

I Rational Bézier curve

I Non-rational Bézier curve

I Cubic Bézier curve

I Quadratic Bézier curve

I Closed composite curve

3D Geometry

I Point cloud

I Helix

I Plane

I Ellipsoid

I Sphere

I Cylinder

I Cone

I Cuboid

I Cube

I Torus

I Translation surface

I Normal swept surface

I Polylinear swept surface

I Extrusion surface

I Swung surface

I Rotation surface

I Lofted surface

I Ruled surface

I NURBS surface

I Rational Bézier surface

I Non-rational Bézier surface

I Mesh of surface segments

I Mesh of tessellating triangles

Geometric constructiontechniques

I Constructive Solid Geometry

I Boundary representation

I Trimmed surfaces

I Parameterized re-use of instances

I Simple re-use of instances

I Construction history modelling

I Multiple alternative representations

I Levels of detail

Geometry-related metadata

I Feature semantics

I Material metadata

I Geometric dimensioning and tolerancing

I Dimensions

I Assembly node metadata

I Assembly hierarchy

Compression andidentification

I Field-wise compression

I Stream-wise compression

I Whole-file compression

I Streaming

I Identification of subassemblies

I Identification of parts

I Identification of surfaces

I Identification of edges

I Identification of vertices

Applications

File formats: levels of support

I Full

I Partial

I None

Processing software: levels of preservation

I Good

I Fair

I Poor

I None

Further work

I Automatic extraction of CAD information to annotations

I Recombination of annotations and geometry into CADmodel

RRoRIfE

I Synchronization with standard registries

I Extension beyond significant characteristicsI openness of formatsI price, availability and customizability of softwareI evaluations of previous preservation actions

Conclusions

I PLM systems need more components and more modularsystems for curation and preservation

I LiMMA provides flexible information flows throughout thelifecycle

I RRoRIfE provides preservation planning capabilities

I Still a lot of work to do before being ready for use.

Thank you for your attention

Any questions?

Towards a Curation and Preservation Architecture for CAD ...€¦ · Towards a Curation and...

Documents

Curation and Preservation of CAD Engineering Models in Product

Preservation Metadata Michael Day Digital Curation Centre UKOLN, University of Bath

Preservation and Curation of University Research Data: Curation Pilots for UC San Diego David Minor Director for Digital Preservation Initiatives Interim

Digital Curation: making the most of it€¦ · Digital Curation Curriculum 6 courses: 3 basic and 3 customized Common Courses: 1. Digital Preservation 2. Foundations of Digital Curation

Sustainability of Digital Preservation Services · Sustainability of Digital Preservation Services E-Infrastructures and services for preservation and curation DCH-RP @ EGI CF 2014

Data Curation and Preservation...Data Curation and Preservation Keith Jeffery(B) Keith G Jeffery Consultants, 71 Gilligans Way, Faringdon SN7 7FX, UK keith.jeffery@keithgjefferyconsultants.co.uk

Digital Curation and Digital Preservation: An Introduction

Workflows for Digital Curation and Preservation

Instruction manual for the collection, preservation and curation of …unesdoc.unesco.org/images/0004/000426/042685eb.pdf · Title: Instruction manual for the collection, preservation

Digital Curation Plan · Digital curation is important; it establishes digital assets, maintains preservation and adds value to digital repositories for present and future access

Preservation and Curation in Institutional Repositories · 2 Preservation and Curation The term ‘digital curation’ is relatively new, having been coined in 2001 as the title for

a centre of expertise in data curation and preservation

Digital Archaeological Data: Curation, Preservation, and Reuse

19 May 20101IVOA Data Curation & Preservation. The Art of Noise – Paranoimia 19 May 20102IVOA Data Curation & Preservation

Balancing the Books The Economics of Digital Curation Training Neil Grindley Digital Preservation & Curation Programme Jisc London, UK n.grindley@jisc.ac.uk

DIGITAL CURATION AND DIGITAL PRESERVATION: CONCEPTUAL … · 2019. 12. 6. · Digital curation and digital preservation have as object of interest the maintenance of digital information

Software curation as a digital preservation service

Digital Preservation, Digital Curation, Digital ... · \爀屮\爀屮Digital curation concepts largely arose from the scientific data and \-science communities, who have traditionally

Role for Libraries in Data Curation & Preservation

An Immediate Approach to the Preservation and Curation of CCSC Urban Metabolism Baselines Project Datasets