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- Recommendation T.503
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- A DOCUMENT APPLICATION PROFILE FOR THE INTERCHANGE
- OF GROUP 4 FACSIMILE DOCUMENTS
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- CONTENTS
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- 1 Scope
- 2 Field of application
- 3 References
- 4 Definitions
- 5 Characteristics supported by this document application profile
- 5.1 Overview
- 5.2 Logical characteristics
- 5.3 Layout characteristics
- 5.4 Content characteristics
- 6 Definition of the document application profile
- 6.1 Overview
- 6.2 Definition of document structure
- 6.3 Definition of attribute values
- 6.4 Content architectures
- Annex A - Format of the values of the attributes "object identifier".
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- Fascicle VII.7 - Rec. T.503 1
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- 1 Scope
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- 1.1 This Recommendation defines a document application profile conforming to the T.410 Series of Recommendations.
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- Its purpose is to specify an interchange format suitable for the interchange of group 4 facsimile documents that
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- contain only raster graphics.
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- Documents are interchanged in a formatted form, which enables the recipient to display or print the document as
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- intended by the originator.
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- 1.2 This Recommendation, together with designated parts of T.563, defines a document application profile that may be
- used by any telematic service.
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- 2 Field of application
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- 2.1 This Recommendation defines a document application profile that is in conformance with the T.410 Series of
- Recommendations and that allows group 4 facsimile documents to be interchanged only in a formatted form, which allows a
- recipient to reproduce the document as intended by the originator.
- 2.2 This document application profile is designed to be independent of the means used to create or to interchange the
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- encoded documents.
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- 2.3 The features which can be interchanged using this document application profile fall into the following categories:
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- a) page format features - these concern how the layout of each page of a document will appear when
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- reproduced;
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- b) raster graphics layout and imaging features - these concern how the document content will appear within
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- pages of the reproduced document;
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- c) raster graphics coding - these concern the raster graphics representations and control functions that make
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- up the document raster graphics content;
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- 2.4 It is assumed that, when negotiation is performed by the service using this document applica- tion profile, all non-
- basic features are subject to negotiation.
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- 3 References
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- The following references are required in order to implement this Recommendation:
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- - T.410 Series Recommendations: Open document architecture (ODA) and interchange format
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- - Rec. T.6: Facsimile coding schemes and coding control functions for Group 4 facsimile apparatus
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- - Rec. X.208: Specification of abstract syntax notation one (ASN.1)
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- - Rec. X.209: Specification of basic encoding rules for abstract syntax notation one (ASN.1)
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- 2 Fascicle VII.7 - Rec. T.503
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- - Rec. T.417: Open document architecture (ODA) and interchange format - raster graphics content
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- architectures
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- - Rec. T.563: Terminal characteristics for group 4 facsimile apparatus
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- Fascicle VII.7 - Rec. T.503 3
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- 4 Definitions
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- The definitions in Recommendation T.411 apply to this Recommendation.
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- 5 Characteristics supported by this document application profile
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- 5.1 Overview
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- A group 4 facsimile document is the result of a formatting process and therefore the purpose of this document
- application profile is to allow transfer of the complete layout of the document.
- Only one category of content is allowed within the same page, namely: raster graphics content (per
- Recommendation T.417) as used by facsimile group 4 apparatus.
- This section specifies the functional description of the features supported by this document application profile.
- 5.2 Logical characteristics
- Not applicable.
- 5.3 Layout characteristics
- 5.3.1 Layout document structure
- A document is seen as a succession of pages.
- The content of a page is: raster graphics content architecture.
- 5.3.2 Document structure elements
- 5.3.2.1Page format
- 5.3.2.1.1The document is imaged in a text area which must be within the assured reproduction area. 5.3.2.1.2The
- dimensions of the assured reproduction area depend on the paper used.
- 5.3.2.1.3The possible paper formats are defined in Recommendation T.563.
- 5.3.2.1.4Only the vertical orientation of the page is permitted.
- 5.3.2.2Block
- Not applicable (the content is directly related to the page).
- 5.4 Content characteristics
- The group 4 facsimile document contains raster graphics in facsimile group 4 format.
- 5.4.1 Raster graphics content
- 5.4.1.1Raster graphics imaging
- The content of raster graphics is defined by the dimensions of the page and the number of pels per line, in
- accordance with Table 2/T.563.
- 5.4.1.2Pel spacing, line spacing and pel transmission density
- This property defines the distance between successive pels on a line and between successive line of pels.
- The basic value is 6 BMU, corresponding to 200 pels per 25.4 mm. It is also the default value. The non-basic
- values are 3, 4 and 5 BMU respectively, corresponding to 400, 300 and 240 pels per 25.4 mm.
- 5.4.2 Received document
- This document application profile, being limited to formatted form, does not support any features to facilitate
- processing of an interchanged document by a receiver.
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- 4 Fascicle VII.7 - Rec. T.503
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- 6 Definition of the document application profile
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- 6.1 Overview
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- 6.1.1 Document architecture level
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- This document profile makes use of document architecture class FDA, as defined in Recommendation T.412. A
- document according to this document architecture profile includes a specific layout structure only.
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- The document architecture level is defined in Tables 2/T.503, 3/T.503 and 4/T.503.
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- The specific layout structure is always present in any document conforming to this document application profile.
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- 6.1.2 Content architecture level
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- The content architecture level that may be used in documents conforming to this document application profile is as
- follows: raster graphics formatted content architecture level, defined in Tables 5/T.503 and 6/T.503.
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- The coding method to be used is that defined by Recommendation T.6. In addition, any non-basic features defined
- in Recommendation T.6 may be used, provided that they are indicated in the document profile.
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- 6.1.3 Document profile level
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- The document profile level used in this document application profile is defined in Table 1/T.503. Every document
- interchanged in accordance with this document application profile must include a document profile. Every non-basic attribute
- value used in a document must be indicated in the document profile.
- 6.1.4 Interchange format class
- The interchange format class used in this document application profile is "B", as defined in Recommendation T.415.
- 6.2 Definition of document structure
- 6.2.1 Specific layout structure
- The number of hierarchical levels is 2, namely:
- - document layout root;
- - page.
- The document layout root and page levels are mandatory. Only one content portion must be associated with each
- page.
- 6.2.2 Generic layout structure
- Not applicable.
- 6.3 Definition of attribute values
- The attributes applicable to layout components are defined in Table 2/T.503. The following notation is used in this
- table:
- --- attribute not application to object description
- m mandatory attribute
- nm non-mandatory attribute
- d defaultable attribute
- Capital letters (M, NM and D) are used for groups of attributes. The allowable attribute values for object
- descriptions are defined in Table 3/T.503.
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- Fascicle VII.7 - Rec. T.503 5
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- TABLE 1/T.503
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- Document profile attributes
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- w
- ┌───────────────────────────────┬───────┬────────────────────────────────────────────┐
- │ Attribute │ Class │ Permissible value │
- ├───────────────────────────────┼───────┼────────────────────────────────────────────┤
- │ Document profile descriptor │ M │ │
- │ │ │ │
- │ Specific layout structure │ m │ Present │
- │ │ │ │
- │ Document characteristics │ M │ │
- │ │ │ │
- │ Document application │ m │ Group 4 fax │
- │ profile │ │ │
- │ │ │ │
- │ Document architecture │ m │ Formatted │
- │ class │ │ │
- │ │ │ │
- │ Non-basic document │ │ │
- │ characteristics │ NM │ │
- │ │ │ │
- │ Page dimensions │ nm │ North American = (10200, 13200 fixed │
- │ (see Note 1) │ │ or variable) │
- │ │ │ ISO B4 = (11811, 16677 fixed or variable) │
- │ │ │ ISO A3 = (14030, 19840 fixed or variable) │
- │ │ │ Japanese legal = (12141, 17196 fixed or │
- │ │ │ variable) │
- │ │ │ Japanese letter = (8598, 12141 fixed or │
- │ │ │ variable) (see Note 2) │
- │ │ │ │
- │ │ │ │
- │ Raster graphics coding │ NM │ │
- │ attributes │ │ │
- │ │ │ │
- │ Compression │ nm │ Uncompressed │
- │ │ │ │
- │ Raster graphics │ NM │ │
- │ presentation attributes │ │ │
- │ │ │ │
- │ Pel transmission │ │ │
- │ density │ nm │ 5 BMU (240 pels/25.4 mm) │
- │ │ │ 4 BMU (300 pels/25.4 mm) │
- │ │ │ 3 BMU (400 pels/25.4 mm) │
- └───────────────────────────────┴───────┴────────────────────────────────────────────┘
-
- Note 1 - This dimension attribute is represented as a data element which consists of
- two integers. The two integers specify width and height of a page in basic measurement
- units (BMUs).
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- Note 2 - An indefinite page length is represented by a variable measure in the vertical
- dimension. The value of this data is then arbitrary and should be the nominal page
- length.
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- 6 Fascicle VII.7 - Rec. T.503
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- TABLE 2/T.503
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- Attributes applicable to layout components
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- w
- ┌──────────────────────────────┬──────────────┬────────────┐
- │ Attribute │ Document │ Page │
- │ │ layout root │ │
- ├──────────────────────────────┼──────────────┼────────────┤
- │ wShared attributesw │ │ │
- │ │ │ │
- │ Object type │ m │ m │
- │ │ │ │
- │ Object identifier │ nm │ nm │
- │ │ │ │
- │ Content portions │ --- │ nm │
- │ │ │ │
- │ Default value lists │ nm │ --- │
- │ │ │ │
- │ wLayout attributesw │ │ │
- │ │ │ │
- │ Presentation attributes │ --- │ d │
- │ │ │ │
- │ Dimensions │ --- │ d │
- └──────────────────────────────┴──────────────┴────────────┘
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- TABLE 3/T.503
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- Attribute values for layout object descriptions
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- w
- ┌────────────────────────┬────────────────────┬─────────────────┬─────────────
- ──────┐
- │ Attribute │ Basic value │ Default │ Non-basic │
- │ │ │ value │ value │
- ├────────────────────────┼────────────────────┼─────────────────┼───────────────────┘
- │ wShared attributesw │ │ │
- │
- │ │ │ │ │
- │ Object type │ Document layout │ None │ None │
- │ │ root, page │ │ │
- │ │ │ │ │
- │ Object identifier │ As defined in │ │ │
- │ │ Rec. T.412 │ None │ None │
- │ │ (see also Annex A) │ │ │
- │ │ │ │ │
- │ Content portions │ As defined in │ None │ None │
- │ │ Rec. T.412 │ │ │
- │ │ │ │ │
- │ Default value lists │ See Table 4/T.503 │ None │ None │
- │ │ │ │ │
- │ │ │ │ │
- │ wLayout attributesw │ │ │
- │
- │ │ │ │ │
- │ Presentation │ See Table 5/T.503 │ │ │
- │ attributes │ │ │ │
- │ │ │ │ │
- └────────────────────────┴────────────────────┴─────────────────┴───────────────────┘
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- Fascicle VII.7 - Rec. T.503 7
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- TABLE 3/T.503 (end)
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- w
- ┌────────────────────┬──────────────────────┬─────────────────┬───────────────
- ─────────┐
- │ Attribute │ Basic value │ Default │ Non-basic
- │
- │ │ │ value │ value
- │
- ├────────────────────┼──────────────────────┼─────────────────┼────────────────────────┤
- │ Dimensions │ Horizontal = 9920 BMU│ Horizontal │ North American
- │
- │ (see Note 1) │ │ = 9920 │ = (10200, 13200)
- │
- │ │ │ │
- │
- │ │ Vertical = 14030 BMU │ Vertical = 14030│ ISO B4 = (11811, 16677)│
- │ │ (see Note 2) │ BMU (see Note 3)│ ISO A3 = (14030, 19840)│
- │ │ │ │ Japanese legal
- │
- │ │ │ │ = (12141, 17196)
- │
- │ │ │ │ Japanese letter
- │
- │ │ │ │ = (8598, 12141)
- │
- │ │ │ │ (see Note 2)
- │
- └────────────────────┴──────────────────────┴─────────────────┴────────────────────────┘
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- Note 1 - This dimension attribute is represented as a data element which consists of two
- integers. The Two integers specify width and height of a page in basic measurement units
- (BMUs).
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- Note 2 - Width is indicated by fixed measure, and at the same time height is indicated
- by either fixed or variable measure.
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- The use of variable measure for height indication depends on each application, for
- example, real time scanning, fixed printing paper, etc. Therefore, for example, when a
- transmitting terminal requests to use variable measure for height indication, a
- receiving terminal will accept variable measure for height indication even though the
- receiving terminal adopts cut sheet paper (fixed size paper) for printing.
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- Note 3 - Both width and height are indicted by fixed measures.
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- TABLE 4/T.503
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- Defaultable attributes that may be specified in a
- default value list of the document layout root
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- w
- ┌──────────────────────────┬──────────────────────────────────┐
- │ Object type │ Defaultable attributes │
- │ │ that can be specified │
- ├──────────────────────────┼──────────────────────────────────┤
- │ Page │ Presentation attributes │
- │ │ Dimensions │
- └──────────────────────────┴──────────────────────────────────┘
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- 6.4 Content architectures
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- 8 Fascicle VII.7 - Rec. T.503
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- The following raster graphics content architecture level is used in this document
- application profile.
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- Fascicle VII.7 - Rec. T.503 9
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- 6.4.1Raster graphics content architecture level
- The type of coding to be used is as defined in Recommendation T.6.
- The code extension control function may be used, provided its use is agreed by prior
- negotiation and is indicated in the document profile. This control function is used to
- invoke uncompressed mode of coding.
- The presentation attributes that may be used are defined in Table 5/T.503.
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- TABLE 5/T.503
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- Presentation attributes
- w
- ┌─────────────────────┬────────────────────┬─────────────────┬────────────────
- ──────────┐
- │ Attribute │ Basic value │ Default │ Non-basic │
- │ │ │ value │ value │
- ├─────────────────────┼────────────────────┼─────────────────┼──────────────────────────┤
- │ Content type │ Formatted raster │ Formatted raster│ None │
- │ │ graphics content │ graphics content│ │
- │ │ architecture │ architecture │ │
- │ │ │ │ │
- │ wRaster graphicsw │ │ │
- │
- │ wattributesw │ │ │
- │
- │ │ │ │ │
- │ Pel path │ 0° │ 0° │ None │
- │ │ │ │ │
- │ Line progression │ 270° │ 270° │ None │
- │ │ │ │ │
- │ Pel transmission │ │ │ │
- │ density │ 6 BMU │ 6 BMU │ 5 BMU (240 pels/25.4 mm) │
- │ │ (200 pels/25.4 mm) │ │ 4 BMU (300 pels/25.4 mm) │
- │ │ │ │ 3 BMU (400 pels/25.4 mm) │
- └─────────────────────┴────────────────────┴─────────────────┴──────────────────────────┘
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- 6.4.2Coding attributes
- Attributes applicable to content portions are defined in Table 6/T.503.
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- TABLE 6/T.503
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- Attributes applicable to content portions
- w
- ┌───────────────────────┬─────────────┬────────────────┬───────────────┬──────
- ─────────┐
- │ Attribute │ Qualifier │ Basic value │ Default │ Non-basic │
- │ │ │ │ value │ value │
- ├───────────────────────┼─────────────┼────────────────┼───────────────┼───────────────┤
- │ Content identifier │ nm │ As defined in │ None │ None │
- │ layout │ │ Rec. T.412 │ │ │
- │ │ │ │ │ │
- │ Type of coding │ d │ T.6 │ T.6 │ None │
- │ │ │ │ │ │
- │ wRaster graphicsw │ │ │ │
- │
- │ wcoding attributesw │ │ │ │
- │
- │ │ │ │ │ │
- │ Number of pels │ d │ As defined in │ As defined in │ None │
- │ per line │ │ Table 3/T.563 │ Table 3/T.563 │ │
- │ │ │ │ │ │
- │ Compression │ d │ Compressed │ Compressed │ Uncompressed │
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- 10 Fascicle VII.7 - Rec. T.503
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- │ │ │ │ │ │
- │ Number of │ d │ As defined in │ As defined in │ None │
- │ discarded pels │ │ Table 3/T.563 │ Table 3/T.563 │ │
- │ │ │ │ │ │
- │ Content information │ m │ T.6 string │ None │ None │
- └───────────────────────┴─────────────┴────────────────┴───────────────┴───────────────┘
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- Fascicle VII.7 - Rec. T.503 11
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- ANNEX A
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- (to Recommendation T.503)
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- Format of the values of the attributes "object identifier"
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- The object identifiers of the specific layout object descriptions are composed of
- sequences of numbers, each of these numbers representing a particular level of the
- specific layout structure.
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- The number assigned to the specific document layout root object description is "1".
- The subordinate pages have a second number which uniquely identifies a particular page.
- The delimiter between "1" and this second number is the "space" character.
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- Examples:
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- "1 27" corresponding coding: w'31 20 32 37w'H
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- where character w'1w' is coded 03/01 or 31 in hexadecimal
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- where character w'spacew' is coded 02/00 or 20 in hexadecimal
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- where character w'2w' is coded 03/02 or 32 in hexadecimal
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- and where character w'7w' is coded 03/07 or 37 in hexadecimal
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- Content portion identifiers are composed of the identifier of the page to which the
- content portion belongs and an additional number which identifies the content portion.
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- Examples:
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- page description "1 27" coding:w'31203237w'H
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- content portion associated with the page "1 27 1" coding:w'312032372031w'H
- (optional)
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- The value of the attribute "content portions" consists of a single number, which
- indicates the content portion of that object. This number is equal to the last number in
- the content portion identifier.
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- 12 Fascicle VII.7 - Rec. T.503
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