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T.441 i   Recommendation T.441  DOCUMENT TRANSFER AND MANIPULATION (DTAM) OPERATIONAL STRUCTURE ă * * * * &CONTENTS HScope 1HOverview of operational concept 2HOperational application profile rules 3HOperational structures 4HOperational reference model 5HOperational profile information 6HOperational data formats H Scope  HThis Recommendation has been established to cover the needs of videotex interworking. It will be further developed to cover the needs of other telematic services.  HThe operational structure should be developed as a set of rules for an interface between telematic applications based on T.400 Series of Recommendations and an ODAdocument.  1 H Overview of operational concept  HA document is defined in terms of logical and/or layout structure according to the specifica tions of the T.410 Series of Recommendations.  HThe basic principle of the operational concept is to provide the means for the integration of telematic services requirements, not covered by the T.410 Series of Recommendations within the applications on the top of DTAM (see Figure 1/T.441). #FIGURE 1/T.441 *  Overview of DTAM (including operational structure) ă  HDocument handling, e.g. access to parts of a document and manipulation of a document requires detailed considerations; two aspects of document handling shall be distinguished:  Ha)  In addition to the document, structural concepts need to be defined in T.400 Series of Recommendations; these concepts shall define the structural aspect of the document handling (as for example "forms for data entry").'  HHX NoteThe definition of structural concepts is not in the scope of this Recommenda tion. Specifications concerning such concepts require further detailed study.'  Hb)  In addition to the document, applications may require operational features which provide information for the interface between the document and the application. Interfaces are for example necessary for "Data Entry", "Spread Sheet", "Remote Editing", etc.'  HAs an application on top of DTAM shall solely use DTAM service and protocol, this Recommendation provides the operational concept which allows to integrate operational features within the concept of DTAM.  HThe operational structure is introduced as a set of rules to structure the interface between a document and the application (see Figure 2/T.441). By defining a mapping onto the operational structure, the application integrates its operational features within DTAM. The mapping has to be specified within the appropriate Recommendation for the relevant application. The semantic of the interface is generally determined by the relevant application. p #FIGURE 2/T.441 *  Operational structures provide the information for a structured ă  interface between the document and the application ă 2 H Operational application profile rules 2.1HGeneral principles  HThis section specifies how operational application profiles can be implemented by using this Recommendation. Application defined usage of T.400 Series of Recommendations is specified in terms of application profiles. An application profile consists of a combination of: H document application profiles according to the rules defined in T.411;'  H communication application profiles according to the rules defined in T.431;'  H operational structure application profiles according to the rules which will be defined in this Recommendation.' 3 H Operational structures  HThis section describes the operational concept which is the basis for remote operation on a document. It facilitates access and manipulation to parts of a document through operations defined in T.430 Series of Recommendations.  HThe concept can be used to associate application defined attributes and content with constituents of documents. For example, it may be used to specify fields for data entry and actions on the content of these fields. In this example, the semantics for data entry and actions may be expressed by the application.  HThe operational structure follows in general the structuring principles typical of the document architecture as described in T.412.  HThe constituents of the operational structure reference the document constituents they are operating on.  HMultiple operational structures may be defined referring to a single document class.  4 H Operational reference model HThis section describes the common understanding of operations on: H the document as a whole; H parts of document. HThis section provides a narrative description of these operations. HAt present two types of operations will be defined: H partial document transfer; H remote document update.  HAny complete set of operations on a document using the operational structure should result in a document conforming to the rules of the T.410 Series of Recommendations. 5 H Operational profile information HAn operational structure profile includes information concerning: H the reference to a document or a document class; H application dependent references; H operational structure level; H the type of the content. 6 H Operational data formats  HThis section describes the format of the datastream used to interchange operational structures. HThe operational structure can be interchanged as a whole or in parts.  HThe datastream is described in terms of a set of operational interchange data units which represent the constituents (e.g. operational profile, object class descriptors, object descriptors, and content) of an operational structure.  HThe formats of the interchanged data units are defined using the abstract syntax notation one (ASN.1).