1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 : TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU-!.G13-!#().%G0G0,!.5!%“!3)#G0G0&/2-!4G0G0,!9/54)45G134G0G0RecommendationG0G0: (Extract from the “LUEG0“OOK)NOTES1 ITU-T Recommendation Z.312 was published in Fascicle X.7 of the Blue Book. This file is an ex
2、tract from theBlue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, thecontents of the file are identical to the Blue Book version and copyright conditions remain unchanged (see below).2 In this Recommendation, the expression “Administration
3、 is used for conciseness to indicate both atelecommunication administration and a recognized operating agency. ITU 1988, 1993All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic ormechanical, including photocopying and microfilm, wit
4、hout permission in writing from the ITU.Fascicle X.7 - Rec. Z.312 1Recommendation Z.312Fascicle X.7 - Rec. Z.312BASIC FORMAT LAYOUT1 GeneralTo facilitate filing and retrieval of recorded information in MML, it is recommended that this informationshould be recorded on pages with an identification hea
5、der at the top of each page. The top and bottom lines of a pageshould not be used but should be left blank.It is further recommended that the layout for printing information in MML should be based on a maximum of72 characters per line and 66 lines per page, as this format can be accommodated on both
6、 the A4 and the 11-inchstandard size paper and can be printed by standard teletypewriters.Where a number of characters per line in excess of 72 is required, a second format is recommended. Thisaccommodates 120 characters per line and would be used, for example, on line printers.In order to save pape
7、r or where paging to facilitate filing of output is not required, paging may be suppressedby suppressing the generation of all superfluous line feeds.To distinguish between the formats recommended, they are further indicated as format F1 for the paper sizesA4 and A5L and format F2 for the paper size
8、 A4L. In the recommended formats specified below, InternationalStandard ISO/2784 1 has been taken into account.2 Recommended formats for presenting information in MML2.1 Format F1According to this format, which is based on the A4 and the 11-inch standard size paper, the maximum numberof characters p
9、er line is 72. The number of lines per page may be 66, using the full 11-inch and A4 paper sizes or 33,using half the paper size (5.5 inch or A5L).Information presented in this format can also be displayed on most of the VDTs available on the market.However, the number of lines which can be displaye
10、d at the same time on these devices is, in general, not more than 20to 25 lines.2.2 Format F2This format allows a maximum of 120 characters printed on a line and has 66 lines per page. It can beaccommodated on paper having a width equal to the A4L standard.Reference1 International Organization for Standardization: Continuous forms used for information processing. Sizes andSprocket feed holes, ISO 2784-1974.
