BSIS0/IEC18670:2025 BSlStandardsPublication Information technology - SoftWare Hash IDentifier (SWHID) Specification V1.2 bsi. BSIS0/IEC18670:2025 BRITISHSTANDARD Nationalforeword ThisBritishStandardistheUKimplementationofIS0/IEC18670:2025 TheUKparticipationinitspreparationwasentrustedtoTechnical CommitteeICT/1,Information systems co-ordination. Alistoforganizationsrepresentedonthiscommitteecanbeobtainedon requestto its committeemanager. Contractual and legalconsiderations Thispublicationhasbeenprepared ingoodfaith,howeverno representation,warranty,assuranceorundertaking(expressor implied) is or will bemade,and noresponsibility or liability is orwill be accepted byBsIinrelationtotheadequacy,accuracy,completeness or liabilityis expresslydisclaimedtothefull extentpermitted bythelaw. Thispublicationisprovidedasis,and istobeused atthe recipient's own risk. The recipient is advised to consider seeking professional guidance with respecttoits use ofthispublication. This publication is not intended to constitute a contract.Users are responsibleforitscorrectapplication. @TheBritishStandardsInstitution2025 PublishedbyBSIStandardsLimited2025 ISBN9780539325478 ICS 35.040;35.040.10 Compliance with a British Standard cannot confer immunity from legalobligations. ThisBritishStandard waspublishedundertheauthorityofthe StandardsPolicyandStrategyCommitteeon30June2025. Amendments/corrigendaissuedsincepublication Date Textaffected BSISO/IEC18670:2025 IEC International ISo Standard IS0/IEC18670 Information technology - First edition 2025-04 SoftWare Hash IDentifier (SWHID) Specification V1.2 Referencenumber ISO/IEC18670:2025(en) ?ISO/IEC2025 BSISO/IEC18670:2025 IS0/IEC18670:2025(en) COPYRIGHTPROTECTEDDOCUMENT IS0/IEC2025 be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on oriso'smemberbody inthecountryoftherequester. ISO copyright office CP401:Ch.de Blandonnet8 CH-1214Vernier,Geneva Phone:+41227490111 Email:[email protected] Website:www.iso.org Published in Switzerland IS0/IEC 2025-All rights reserved ii BSISO/IEC18670:2025 IS0/IEC18670:2025(en) Contents Page Foreword. .iv Introduction .V 1 Scope. .1 2 Normativereferences .1 .1 3 Terms and definitions 4 Syntax 3 5 Core identifiers 3 5.1 General. .3 5.2 Contents .3 5.3 Directories. 4 5.4 Revisions .5 5.5 Releases. .7 5.6 Snapshots .8 5.7 CompatibilitywithGit. .9 6 Qualified identifiers .10 6.1 Qualifiers 10 6.2 Fragment qualifiers. .10 6.2.1 General .10 6.2.2 Lines qualifier .10 6.2.3 Bytes qualifier 10 6.3 Context qualifiers. .11 6.3.1 General 11 6.3.2 Origin qualifier 11 6.3.3 Visit qualifier.. 11 6.3.4 Path qualifier .11 Anchorqualifier .11 6.3.5 6.4 Comparing qualified SWHIDs 12 6.5 Recommendations 12 AnnexA(informative)Specificationversioning .13 Bibliography 14 IS0/IEC 2025-All rights reserved ii BSISO/IEC18670:2025 IS0/IEC18670:2025(en) Foreword ISo (theInternationalOrganizationforStandardization)andIEC(theInternationalElectrotechnical Commission) form the specialized system for worldwide standardization.National bodies that are membersof ISoorIECparticipateinthedevelopmentof International Standardsthroughtechnical IsOandIECtechnical committees collaborateinfields ofmutual interest.Other international organizations, governmentalandnon-governmental,inliaisonwithIsOand IEC,alsotakepartinthework. Theproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribed intheIso/lEcDirectives, Part1.Inparticular,the different approval criterianeededforthe differenttypes ofdocumentshouldbenoted (seewww.iso.org/directivesorwww.iec.ch/members_experts/refdocs). ISOandIECdrawattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvethe useof (a)patent(s).IsOandIECtakenopositionconcerningtheevidence,validityorapplicabilityofany claimed patent rights in respect thereof.As of thedate ofpublication of this document, IsO and IEc had not receivednoticeof (a)patent(s)whichmayberequiredtoimplementthisdoc