IEC 62298-4:2005

INTERNATIONAL IEC
STANDARD 62298-4
First edition
2005-10
TeleWeb application –
Part 4:
Hyperteletext profile
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INTERNATIONAL IEC
STANDARD 62298-4
First edition
2005-10
TeleWeb application –
Part 4:
Hyperteletext profile
 IEC 2005  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
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– 2 – 62298-4  IEC:2005(E)
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope.6
2 Normative references .6
3 Terms, definitions and abbreviations .7
3.1 Terms and definitions .7
3.2 Abbreviations .7
4 Mandatory Superteletext profile features .8
4.1 Font issues.8
4.2 Dithering .8
4.3 TeleWeb EPG .8
4.4 Cross-linking between services .8
4.5 Memory requirements.8
5 General display-related extensions.9
5.1 Downloadable fonts .9
5.2 Support for non-Latin alphabets .9
5.3 Page size and page scrolling.9
6 Hypertext extensions .9
6.1 HTML frames.10
6.2 Forms.16
6.3 Internationalization.25
6.4 tag .26
6.5 tag .27
7 User profiles.29
8 ISP interface .29
8.1 The ISP special function.29
8.2 Network congestion control .31
9 Device ID (OPTIONAL).33
10 Cross-linking and context-switching.33
10.1 Additional URI schemes .33
11 Audio clips (OPTIONAL) .33
12 Style sheets .34
13 Scripting.34
13.1 ECMAScript.34
13.2