ISO/IEC 14752-ed.1.0

Detail information

Designation: ISO/IEC 14752-ed.1.0

Publication date: 13/04/2000

Pages: 29

Country: International technical standard

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Anotation

This Recommendation | International Standard is based on the framework of abstractions and concepts developed in the Reference Model for Open Distributed Processing (ITU-T Rec. X.902 | ISO/IEC 10746-2 and ITU-T Rec. X.903 | ISO/IEC 10746-3). This Recommendation | International Standard defines how interactions between computational objects in a computational specification of a system relate to protocol support for those interactions in an engineering specification of that system. In particular it: ? defines a General Interworking Framework (GIF); ? within the GIF, defines a set of facilities each comprising a set of functionally-related service primitives as abstract definitions of the interactions of basic engineering objects and channel objects; ? defines the parameters of the service primitives of the GIF; ? defines the permitted sequence of the service primitives by means of state tables; ? specifies, in annexes, the mapping of the GIF service primitives and their parameters to the messages and fields of particular protocols. As specified in this Recommendation | International Standard, the GIF defines protocol support for a pragmatic subset of the possible computational interactions defined in ITU-T Rec. X.903 | ISO/IEC 10746-3. It is also restricted in the features of the protocol support and the supported transparencies. The GIF, as specified here, defines: ? support for computational operations, but not for streams; ? support using stub, binder and protocol objects hierarchically, such that any interaction at the interworking reference point of the supporting protocol object supports liaisons of one of those objects or of the basic engineering object, and any interaction to support those liaisons is passed via that interworking reference point; and ? interactions at a single interworking reference point, from the perspective of one side; interceptors are not explicitly considered; NOTE 1 ? It is intended that the GIF could be extended, in a future amendment, to support streams and flows. The present specification is restricted to areas that are technically stable. The GIF supports at least some forms of: ? access transparency; and ? location transparency. The GIF as specified here also supports a limited equivalent of relocation transparency. Other transparencies are not addressed in this present specification. NOTE 2 ? It is intended that the GIF could be extended, in future amendments, to support additional transparencies. The GIF does not explicitly model Quality of Service requirements. The application of security-related issues to the GIF are not included in the current text and are for further study. The set of mappings to particular protocols specified in annexes to this Recommendation | International Standard is not exhaustive. The GIF could be mapped to other protocols. NOTE 3 ? In particular, a mapping to the DCOM protocol family would be a candidate for an additional annex. La presente Recommandation | Norme internationale est fondee sur le cadre dabstractions et de concepts elabores dans le modele de reference pour le traitement reparti ouvert (Rec. UIT-T X.902 | ISO/CEI 10746-2 et Rec. UIT-T X.903 | ISO/CEI 10746-3). La presente Recommandation | Norme internationale definit la maniere dont les interactions entre objets de traitement, contenues dans une specification de traitement de systeme, sassocient au protocole support pour les interactions contenues dans une specification dingenierie de ce systeme. Plus precisement: ? elle definit un cadre dinterfonctionnement general (GIF); ? elle definit, a linterieur de ce cadre, un ensemble de capacites composees chacune dun ensemble de primitives de service en relation fonctionnelle sous forme de definitions abstraites des interactions entre objets dingenierie de base et objets de canal; ? elle definit les parametres des primitives de service du cadre GIF; ? elle definit au moyen de tables detats la sequence des primitives de service admise; ? elle specifie, dans ses annexes, le mappage des primitives de service du cadre GIF, ainsi que de leurs parametres, dans les messages et dans les champs de protocoles particuliers. Comme specifie dans la presente Recommandation | Norme internationale, le cadre GIF definit le support protocolaire pour un sous-ensemble pragmatique des interactions de traitement possibles selon les definitions figurant dans la Rec. UIT-T X.903 | ISO/CEI 10746-3. Son domaine est egalement limite aux caracteristiques du protocole support et aux transparences prises en charge. Le cadre GIF, tel que specifie ici, definit: ? la prise en charge des operations de traitement informatique mais non celle des flux composites; ? le support hierarchique au moyen dobjets talon, de lien et de protocole, de facon que toute interaction, au point de reference dinterfonctionnement de lobjet de protocole support, prenne en charge les liaisons de lun de ces objets ou de lobjet dingenierie de base, et de facon que toute interaction prenant en charge ces liaisons soit transmise par ce point de reference dinterfonctionnement; ? les interactions intervenant a un unique point de reference dinterfonctionnement, tel que vu de lune des extremites; les intercepteurs ne sont pas explicitement pris en compte. NOTE 1 ? Une possibilite dextension du cadre GIF est prevue, dans un futur amendement, afin de prendre en charge les flux composites et individuels. La presente Specification est limitee aux domaines qui sont techniquement stables. Le cadre GIF prend en charge au moins certaines formes: ? de transparence dacces; ? de transparence de localisation. Le cadre GIF qui est specifie ci-apres prend egalement en charge un equivalent limite de la transparence de relocalisation. Les autres transparences ne sont pas traitees dans la presente Specification. NOTE 2 ? Une possibilite dextension du cadre GIF est prevue dans de futurs amendements afin de prendre en charge des transparences supplementaires. Le cadre GIF ne modeli