ISO INTERNATIONAL STANDARD 14306 Second edition 2017-11 Industrial automation systems and integration JT file format specification for 3D visualization Systemes d'automatisation industrielle et integration - Spécification de format de fichier JT pour visualisation 3D Reference number IS0 14306:2017(E) @ IS0 2017 IS0 14306:2017(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either Iso at the address below or ISo's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org ii @ IS0 2017 - All rights reserved ISO 14306:2017(E) Content Content.. . ili Foreword. xvi Introduction. xvii 1 Scope.. 2 Normative references.. 3 Terms, definitions and abbreviated terms. 3.1 Terms and definitions . 3.2 Abbreviated terms ... 5 4 Notational conventions.. 5 14 5.1 FileStructure 14 5.1.1 File Header 5.1.2 Toc Segment. 16 5.1.3 Data Segment... 5.2 Data Segments. 6 LSG Segment... .24 6.1 Graph Elements .. 24 6.1.1 Node Elements.... 25 6.1.2 Attribute Elements.... 6.2 Property Atom Elements.. 92 6.2.1 Base Property Atom Element.. 92 6.2.2 String Property Atom Element.... 93 6.2.3 IntegerPropertyAtomElement 94 6.2.4 Floating Point Property Atom Element 94 6.2.5 JT Object Reference Property Atom Element. 95 6.2.6 Date Property Atom Element... 96 6.2.7 LateLoadedPropertyAtomElement. 97 6.2.8 Vector4f Property Atom Element. 99 6.3 Property Table........ 99 6.3.1 Element Property Table ... .100 7 Shape LOD Segment... 102 7.1 Shape LOD Element . 102 7.1.1 Base Shape LOD Element... 102 7.1.2 Vertex Shape LOD Element... 103 7.1.3 Tri-Strip Set Shape LOD Element . 118 7.1.4 Polyline Set Shape LOD Element... 118 7.1.5 Point Set Shape LOD Element ... 119 7.1.6 Null Shape LOD Element .. 120 7.2 Primitive Set Shape Element 120 7.2.1 Lossless Compressed Primitive Set Data. 122 7.2.2 LossyQuantizedPrimitiveSetData 124 8 Geometry Segments.... 129 8.1 STEP B-Rep Segment. 129 8.2 XT B-Rep Segment. 129 8.3 JT ULP Segment.... 129 8.4 JT LWPA Segment.. 129 8.5 Wireframe Segment. 129 8.6 JT B-Rep Element (deprecated) 129 9 Meta Data Segment ... 131 ISO 2017-All rights reserved ii ISO 14306:2017(E) 9.1 Property Proxy Meta Data Element.. 131 9.1.1 Date Property Value ..... 9.2 PMI Manager Meta Data Element . 134 9.2.1 PMI Entities .. 137 9.2.2 158 9.2.3 PMI User Attributes .. .160 9.2.4 PMI String Table 161 9.2.5 PMI Model Views. 161 9.2.6 Generic PMI Entities.... 9.2.7 PMI CAD Tag Data . 169 9.2.8 PMI Polygon Data .. 170 10 Data Compression and Encoding .. 174 10.1 Common Compression Data Collection Formats ... 174 10.1.1 Int32 Compressed Data Packet.... 174 10.1.2 Int32 Compressed Data Packet Mk. 2. 179 10.1.3 Float64 Compressed Data Packet.... 185 10.1.4 Compressed Vertex Coordinate Array 10.1.5 Compressed Vertex Normal Array. 190 10.1.6 Compressed Vertex Texture Coordinate Array 192 10.1.7 Compressed Vertex Colour Array..... 194 10.1.8 Compressed Vertex Flag Array.... 196 10.1.9 Point Quantizer Data ... 197 10.1.10 Texture Quantizer Data .. 197 10.11 Colour Quantizer Data..... 198 10.1.12 Uniform Quantizer Data .. 200 10.1.13 Compressed Entity List for Non-Trivial Knot Vector.. 200 10.14 Compressed Control Point Weights Data.... 204 10.15 Compressed Curve Data.... 10.1.16 Compressed CAD Tag Data.. .208 10.2 Encoding Algorithms 211 10.2.1 Uniform Data Quantization .211 10.2.2 Bitlength CODEC 211 10.2.3 Arithmetic CODEC.. 212 10.2.4 Deering Normal CODEC 217 10.3 zlib compression ... .219 11 Common Data Conventions and Constructs. .220 11.1 Late-Loading Data .. .220 11.2 Toc Segment Location... 220 11.3