Raster-Gr-Presentation-Attributes { 2 8 1 7 2 } DEFINITIONS ::= BEGIN EXPORTS Raster-Graphics-Attributes, One-Of-Four-Angles, One-of-Two-Angles, Pel-Transmission-Density, Measure-Pair, Clipping, Pel-Spacing, Spacing-Ratio, Image-Dimensions; Raster-Graphics-Attributes ::=SET { pel-path [0] IMPLICIT One-Of-Four-Angles OPTIONAL, line-progression [1] IMPLICIT One-Of-Two-Angles OPTIONAL, pel-transmission-density [2] IMPLICIT Pel-Transmission-Density OPTIONAL, initial-offset [3] IMPLICIT Measure-Pair OPTIONAL, clipping [4] IMPLICIT Clipping OPTIONAL, pel-spacing [5] Pel-Spacing OPTIONAL, spacing-ratio [6] IMPLICIT Spacing-Ratio OPTIONAL, image-dimensions [7] Image-Dimensions OPTIONAL } One-Of-Four-Angles ::=INTEGER { d0 (0), d90 (1), d180 (2), d270 (3) } One-Of-Two-Angles ::=INTEGER { d90 (1), d270 (3) } Pel-Transmission-Density ::=INTEGER { p6 (1), -- 6 BMU p5 (2), -- 5 BMU p4 (3), -- 4 BMU p3 (4), -- 3 BMU p2 (5), -- 2 BMU p1 (6), -- 1 BMU } Measure-Pair ::=SEQUENCE { horizontal [0] IMPLICIT INTEGER vertical [0] IMPLICIT INTEGER } Clipping ::= SEQUENCE { first-coordinate-pair [0]IMPLICIT Coordinate-Pair OPTIONAL, second-coordinate-pair [1]IMPLICIT Coordinate-Pair OPTIONAL } Coordinate-Pair ::=SEQUENCE { x coordinate INTEGER y coordinate INTEGER } Pel-Spacing ::=CHOICE { spacing [0] IMPLICIT SEQUENCE { length INTEGER, pel-spacing INTEGER }, null [1] IMPLICIT NULL } Spacing-Ratio ::=SEQUENCE { line-spacing-value INTEGER pel-spacing-value INTEGER } Image-Dimension ::=CHOICE { width-controlled [0] IMPLICIT SEQUENCE { minimum-width INTEGER, preferred-width INTEGER }, height-controlled [1] IMPLICIT SEQUENCE { Fascicle VII.6 - Rec. T.417 1 minimum-height INTEGER, preferred-height INTEGER }, area-controlled [2]IMPLICIT SEQUENCE { minimum-width INTEGER, preferred-width INTEGER, minimum-height INTEGER, preferred-height INTEGER, aspect-ratio-flag INTEGER { fixed (0), variable (1) }}, automatic [3] IMPLICIT NULL } END Note - The following types are also defined in orther Recommendations in the T.410 Series: 'One-Of-Four-Angles', 'One-Of-Two-Angles', 'MeasurePair'. 8.3 Representation of coding attributes Raster-Gr-Coding-Attributes { 2 8 1 7 3 } DEFINITIONS ::= BEGIN EXPORTS Raster-Gr-Coding-Attributes, Compression; Raster-Gr-Coding-Attributes ::= SET { number-of-pels-per-line [0] IMPLICIT INTEGER OPTIONAL, number-of-lines [1] IMPLICIT INTEGER OPTIONAL, compression [2] IMPLICIT Compression OPTIONAL, number-of-discarded-pels [3] IMPLICIT INTEGER OPTIONAL } Compression ::=INTEGER {uncompressed (0), compressed (1)} END 8.4 Representation of non-basic features and non-standard defaults Raster-Gr-Profile-Attributes { 2 8 1 7 4 } DEFINITIONS ::= BEGIN EXPORTS Ra-Gr-Presentation-Feature, Ra-Gr-Coding-Attribute, Raster-Gr-Content-Defaults; IMPORTS One-Of-Four-Angles, One-Of-Two-Angles, Pel-Transmission-Density, Measure-Pair, Clipping, Pel-Spacing, Spacing-Ratio, Image-Dimensions; FROM Raster-Gr-Presentation-Attributes, Compression, 2 Fascicle VII.6 - Rec. T.417 FROM Raster-Gr-Coding-Attributes; Ra-Gr-Presentation-Feature ::= CHOICE { pel-path [9] IMPLICIT One-Of-Four-Angles, line-progression [10]IMPLICIT One-Of-Two-Angles, pel-transmission-density [11]IMPLICIT Pel-Transmission-Density } -- The tag values used above preserve compatibility with Group 4 Class 1 facsimile data streams. Ra-Gr-Coding-Attribute ::= CHOICE { compression [0] IMPLICIT Compression } -- The tag values used above preserve compatibility with Group 4 Class 1 facsimile data streams. Fascicle VII.6 - Rec. T.417 3 Raster-Gr-Content-Defaults ::=SET { pel-path [0] IMPLICIT One-Of-Four-Angles OPTIONAL, line-progression [1] IMPLICIT One-Of-Two-Angles OPTIONAL, pel-transmission-density [2] IMPLICIT Pel-Transmission-Density OPTIONAL, pel-spacing [5] Pel-Spacing OPTIONAL, spacing-ratio [6] IMPLICIT Spacing-Ratio OPTIONAL, compression [8] IMPLICIT Compression OPTIONAL } END 9 Coding schemes A pel array may be represented within a text unit by means of one of the following encoding schemes: - Group 4 facsimile encoding scheme; - Group 3 facsimile encoding schemes; - bitmap encoding scheme. 9.1 Group 4 facsimile encoding scheme In this encoding scheme, a pel array is encoded according to Recommendation T.6. The colours "black" and "white" referred to in this Recommendation should be interpreted as "foreground" and "background", or "set" and "unset", respectively. 9.2 Group 3 facsimile encoding scheme In these encoding schemes, a pel array is encoded according to one or two dimensional encoding schemes defined in Recommendation T.4. The colours "black" and "white" referred to in this Recommendation should be interpreted as "foreground" and "background", or "set" and "unset" respectively. When using the Recommendation T.4 one- or two-dimensional encoding scheme, the encoded data belonging to each content portion must be terminated by a RTC (Return to control), the format of which is defined in Recommendation T.4. If the total number of bits belonging to a content portion is not a multiple of eight (i.e., an integral number of octets), then the RTC must be followed by the minimum number of '0' bits such that the last bit aligns on an octet boundary. In addition, the use of EOL is required to indicate the end of encoding of each line of pels and make up codewords can be used recursively to encode runs of pels longer than 2624. When using the two-dimensional encoding scheme, any number of fill bits and any value of K-parameter may be used without declaration in coding attributes. 9.3 Bitmap encoding scheme Each element in a pel array may have one of two distinct states. These are the set state, corresponding to background colour. For the purpose of representing such an array within a content portion, each pel may be represented by a single bit which has the value '0' or '1' depending on the state of the pel. If the pel has the unset state, the value of the bit is '0'; otherwise the value of the bit is '1'. In the bitmap encoding scheme, each row of the resulting array of bits is encoded, within a content portion, by a string of octets. It the number of bits in each row of the pel array is not a multiple of eight, then it is extended by the minimum number of '0' bits such that the last bit aligns on an octet boundary. When the content portion is decoded, the coding attribute "number of pels per line" is used to determine the number of bits in each line that are significant, the remaining bits being ignored. The relationship between the order of the pels and the order of the bits within an octet is such that the first pel in the order of bits is allocated to the most significant bit of an octet. 4 Fascicle VII.6 - Rec. T.417 Note - This encoding scheme is distinct from the uncompressed mode of the Groups 3 and 4 facsimile encoding schemes. 10 Content layout process This section describes a content layout process for basic logical objects associated with raster graphics content architectures. Its purpose is to aid understanding of the semantics of the presentation attributes and coding attributes by describing the required results of such a process. However, it is not intended to specify any process that might be carried out in a particular implementation to achieve these results. 10.1 Introduction 10.1.1 Purpose The content layout process describes the process of laying out raster graphic content into an allocated area. This area is referred to as the available area and is determined by the document layout process defined in Recommendation T.412. The purpose of the content layout process is to convert content associated with basic logical components into content associated with basic layout objects. The content layout process results in the creation of a basic layout object(s) into which the content is to be positioned. The dimensions of each basic layout object are returned to the document layout process, which determines the precise position of that basic layout object within the available area. One of two methods can be followed for laying out the content of a basic logical object. These methods are: - the fixed dimension content layout method; - the scalable dimension content layout method. The choice of method depends on the particular presentation attributes associated with the basic logical object. 10.1.2 Available area The content layout process is constrained by the available area. The maximum dimensions that a basic layout object can take are constrained by the dimensions of the available area. During the layout of the content associated with a basic logical object into a basic layout object, the following cases can occur: - the formatted processable content fits into the available area; - the formatted processable content does not fit into the dimensions of the available area. In this case, a new available area is required. 10.1.3 Presentation attributes The content layout process takes into account the presentation attributes applying to the basic logical object with which the content is associated. The presentation attributes applying to the content layout process can be specified in the generic layout structure and presentation styles. The values of these presentation attributes are determined according to the defaulting rules specified in Recommendation T.412. 10.1.4 Coding attributes The content layout process takes into account the coding attributes applying to the content portion. Fascicle VII.6 - Rec. T.417 5 10.1.5 Raster graphics content architecture classes The content layout process is only specified for basic logical objects associated with the formatted processable raster graphics content architecture class. The content layout process does not modify the form of the content. 6 Fascicle VII.6 - Rec. T.417 10.1.6 Layout of the content For the raster graphics formatted processable content architecture class, one case of laying out the content into basic objects is possible: - single basic logical to single basic layout object: the content of a single basic logical object can be laid out into a single basic layout object and is the only content associated with this basic layout object. 10.2 Notation The following notation is used in the description of the description of the determination of block dimensions: BDH Horizontal block dimension BDV Vertical block dimension. NLC Number of lines of the clipped array NPC Number of pels per line of the clipped array AAH Horizontal dimension of available area AAV Vertical dimension of available area PS Pel spacing SR Spacing ratio 10.3 The fixed dimension content layout method If the value of the attribute "pel spacing" is specified as other than 'null', the fixed dimension content layout method is followed. The fixed dimension content layout method creates a block with dimensions that satisfy the values of the following attributes: - the presentation attributes (defined in Section 6): - "clipping"; - "pel path"; - "pel spacing"; - "spacing ratio"; - the coding attributes (defined in  7.2): - "number of lines"; - "number of pels per line". The fixed dimension content layout process creates a block of the minimum dimensions that are required to accommodate the clipped pel array in accordance with the pel spacing and line spacing. Note that the pel spacing is explicitly specified by the attribute "pel spacing", whereas the line spacing is determined from the pel spacing and the attribute "spacing ratio". The horizontal and vertical block dimensions are determined, such that the reference areas of all the pels of the clipped pel array completely fill the basic layout object. The block dimensions depend on the pel path, pel spacing, spacing ratio, number of pels per line and number of lines as defined in Table 4/T.417. TABLE 4/T.417 Dimensions of a basic layout object w 旼컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴� � Pel path � Horizontal block � Vertical block � � � dimension (BDH) � dimension (BDV) � 쳐컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴� � 0, 180 � NPC * PS � NLC * SR * PS � � 90, 270 � NLC * PS * SR � NPC * PS � 읕컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴� Note - The notation used in this table is described in  10.2. Fascicle VII.6 - Rec. T.417 7 If one of the following conditions occurs: BDH > AAH or BDV > AAV then the block will not fit into the available area. It is then the responsibility of the document layout process to determine whether or not the content layout process is to be repeated for an alternative available area. 10.4 The scalable dimension content layout method If the value of the attribute "Pel spacing" is specified as 'null', the scalable content layout method is followed. In this case the pel spacing will depend upon the value of the attribute "image dimensions" and the available area provided by the document layout process. The aim of the content layout process for scalable dimension content portions is to lay out the content, within the available area, in a basic layout object with the maximum dimensions possible, considering the image dimensions and the spacing ratio specified. The block dimensions are determined by: a) the presentation attributes values (defined in Section 6): - "clipping"; "pel path"; - "image dimensions"; - "spacing ratio"; b) the coding attributes (defined in  7.2): - "number of lines"; - "number of pels per line". The scalable dimension content layout method first determines the aspect ratio of the clipped pel array, from the "number of pels per line" and "number of lines", taking into consideration the "spacing ratio": w NPC aspect ratio = 컴컴컴컴 NLC * SR Determination of the dimensions of the basic layout object depends on the value of the presentation attribute "image dimensions". The four possible cases are illustrated in Figures 4/T.417 to 7/T.417 and are described below: a) The attribute "image dimensions" specifies a value for the parameter "width controlled". In this case the width of the basic layout object will be within the range specified by the originator. The determination of basic layout object dimentions is constrained by the range of allowed widths given by the value of the parameter "width controlled", the dimensions of the available area and the aspect ratio of the clipped array. The dimension of the basic layout object shall be determined such that: the basic layout object fits into the available area; the aspect ratio of the basic layout object is the same as that of the clipped pel array; and the width of the basic layout object has a value that is within the range of allowed widths. Also, the width of the basic layout object is determined such that the deviation from the value of "preferred width", specified by the parameter "width controlled", is as small as possible. b) The presentation attribute "image dimensions" specifies a value for the parameter "height controlled". In this case the height of the basic layout object will be within the range specified by the originator. The determination of basic layout object dimensions is constrained by the range of allowed heights given by the value of the paramenter "height controlled", the dimensions of the available area and the aspect ratio of the 8 Fascicle VII.6 - Rec. T.417 clipped pel array. Fascicle VII.6 - Rec. T.417 9 The dimensions of the basic layout object shall be determined such that: the basic layout object fits into the available area; the aspect ratio of the basic layout object is the same as that of the clipped pel array; and the height of the basic layout object has a value that is within the range of allowed heights. Also, the height of the basic layout object is determined such that the deviation from the value of "preferred height", specified by the parameter "height controlled", is as small as possible. c) The attribute "image dimensions" specifies a value for the parameter "area controlled". In this case the dimensions of the basic layout object will be within the range specified by the originator. In particular, this can be used to ensure the basic layout object will have a fixed size. The determination of basic layout object dimensions is constrained by the range of allowed heights and widths given by the value of the parameter "area controlled", the dimensions of the available area and, depending upon the value of the "aspect ratio flag" of the parameter "area controlled", by the aspect ratio of the clipped pel array. The dimensions of the basic layout object shall be determined such that: the basic layout object fits into the available area; the width of the basic layout object has a value that is within the range of allowed widths; and the height of the basic layout object has a value that is within the range of allowed widths; and the height of the basic layout object has a value that is within the range of allowed heights. If the value of "aspect ratio flag" is 'fixed' there is the further constraint to the baisc layout object dimensions, that the aspect ratio of the basic layout object must be the same as that of the clipped pel array. Also both the width and height of the basic layout onbject shall be chosen such, that their deviations from their preferred values, specified by the parameter "area controlled", are both as small as possible. d) The attribute "image dimensions" specifies a value for the parameter "automatic". In this case the dimensions of the basic layout object will be automatically adjusted to the page layout. The determination of basic layout object dimensions is constrained by the dimensions of the available area and the aspect ratio of the clipped pel array. The dimensions of the basic layout object have to be determined such that: the basic layout object fits into the available area; the width of the basic layout object is given the same value as the dimension of the available area in the same direction; and the height of the basic layout object is determined such, that the aspect ratio of the basic layout object is the same as that of the clipped pel array. If the given constraints cannot be met, then the document layout process (defined in Recommendation T.412) is responsible for determining if the content layout method is to be repeated for an alternative available area. The dimensions of a basic layout object are restricted to integral multiples of 1 SMU. 10 Fascicle VII.6 - Rec. T.417 FIGURE 4/T.417 Diagrams used to illustrate the process of determining the basic layout object dimensions Fascicle VII.6 - Rec. T.417 11 FIGURE 5/T.417 Layout process for the presentation attribute "image dimensions" when a value is specified for the parameter "automatic" 12 Fascicle VII.6 - Rec. T.417 FIGURE 6/T.417 Layout process for the presentation attribute "image dimensions" when a value is specified for the parameter "width controlled" or "height controlled" Fascicle VII.6 - Rec. T.417 13 FIGURE 7/T.417 Layout process for the presentation attribute "image dimensions" when a value is specified for the parameter "area controlled" 14 Fascicle VII.6 - Rec. T.417 11 Content imaging process This section describes a content imaging process for basic layout objects associated with raster graphics content architectures. Its purpose is to aid understanding of the semantics of the shared and layout presentation attributes and coding attributes by describing the required results of such a process. However, it is not intended to specify any process that might be carried out in a particular implementation to achieve these results. 11.1 Introduction The content imaging process is only concerned with the layout structues, the presentation styles and the content of basic layout components conforming to this Recommendation. The content imaging process is applicable to basic layout objects associated with the formatted and formatted processable raster graphics content architecture classes. 11.2 Content imaging process for formatted form This section describes how the image of the content is influenced by the various presentation and coding attributes applying to the formatted raster graphics content architecture class. The array of pels to be imaged consists only of those pels of the interchanged pel array which remain after the pels at the beginning of each line, specified by coding attribute "Number of discarded pels", have been subtracted. The first pel of this array is positioned at the initial point. The initial point is determined by the attribute "initial offset". Only the pels, which are positioned completely within the basic layout object are imaged. 11.3 Content imaging process for formatted processable form This section describes how the image of the content is influenced by the various presentation and coding attributes applying to the formatted processable raster graphics content architecture class. The clipped pel array is imaged in the basic layout object with the first pel at the initial point. The initial point is determined by the pel path, line progression and by the dimensions of the basic layout object, as defined in Table 2/T.417. The pel spacing is defined as the width of the basic layout object divided by the number of pels in a line of the clipped pel array. The line spacing is defined as the height of the basic layout object divided by the number of lines in the clipped pel array. 12 Definition of raster graphics content architecture classes This section defines the two classes of raster graphics content architectures described in  4: - formatted raster graphics content architecture class; - formatted processable raster graphics content architecture class. Tables 5/T.417 and 6/T.417 specify the categories of presentation and content portion attributes that pertain to these content architecture classes. Content architecture levels for use in application profiles can be defined from these classes using the rules specified in Recommenda- tion T.411. Fascicle VII.6 - Rec. T.417 15 12.1 Summary of raster graphic presentation attributes Table 5/T.417 contains a list of raster graphics presentation attributes, and identifies, for each content architecture class, those which are defaultable and those which are not applicable. 16 Fascicle VII.6 - Rec. T.417 TABLE 5/T.417 Raster graphics presentation attributes w 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴 컴커 � � Content architecture � � � class � � Presentation attribute 쳐컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴� � � Formatted � Formatted � � � form 쿾rocessable form � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴캑 � Pel path � D � D � � � � � � Line progression � D � D � � � � � � Pel transmission density � D � - � � � � � � Initial offset � D � - � � � � � � Pel spacing � - � D � � � � � � Spacing ratio � - � D � � � � � � Clipping � - � D � � � � � � Image dimensions � - � D � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴켸 Note - The notation used in this table is: - Non applicable D Applicable and defaultable 12.2 Summary of raster graphic content portion attributes Table 6/T.417 contains a list of raster graphics content portion attributes, and identifies, for each content architecture clas , those which are mandatory, non- mandatory, defaultable and not applicable. TABLE 6/T.417 Raster graphics content portion attributes w 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴 컴커 � � Content architecture � � � class � � Content portion attribute 쳐컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴� � � Formatted � Formatted � � � form 쿾rocessable form � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴캑 � Number of pels per line � D � M � � � � � � Type of coding � D � D � � � � � � Compression � D � D � � � � � � Number of discarded pels � D � - � � � � � � Number of lines � - � NM � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴켸 Note 1 - The notation used in this table is: Fascicle VII.6 - Rec. T.417 17 - Not applicable; D Applicable and defaultable; NM Applicable and non-mandatory; M Applicable and mandatory. Note 2 - The attribute "compression" is only applicable if the value of the attribute "type of coding" is 'T.6 encoding' of 'T.4 two dimensional encoding'. 18 Fascicle VII.6 - Rec. T.417 ANNEX A (to Recommendation T.417) Summary of raster graphics content architecture classes (Informative) This Annex summarizes the presentation attributes and content portion attributes that apply to each of the two content architecture classes (formatted and formatted processable) defined in Section 12, together with their permissible values and default values. The purpose of this Annex is to facilitate the definition of raster graphisc content architecture levels for use in document application profiles (see Recommendation T.411). A.1 Formatted raster graphics content architecture class Content pertaining to the formatted raster graphics content architecture class may only be associated with basic layout components. A.1.1Presentation attributes w 旼컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴� � Attribute � Permissible values � Default value � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿛el path �0, 90, 180, 270 degrees � 0 degrees � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿗ine progression �90, 270 degrees � 270 degrees � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿛el transmission �6, 5, 4, 3, 2, � 6 BMU � 쿭ensity �1 BMU � � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿔nitial offser �(Any integer, � See Note � � � any integer) � � 읕컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴� Note - The default value of "initial offset" depends upon the pel path and line progression as defined in Table 2/T.417. A.1.2Content portion arttributes w 旼컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴� � Attribute � Permissible values � Default value � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿙umber of pels per 쿌ny positive integer쿞ee Note 1 � 쿹ine � � � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿙umber of discarded 쿌ny non-negative 쿞ee Note 2 � 쿾els 쿶nteger � � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿟ype de coding 쿝ec. T.6 encoding 쿝ec. T.6 encoding � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿎ompression 쿎ompressed, 쿎ompressed as in � � 퀅ncompressed as in 쿝ec. T.6 � � 쿝ec. T.6 � � 읕컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴� Note 1 - The default number of pels per line depends upon the pel transmission density as defined in Table 3/T.417. Note 2 - If the number of pels per line exceeds the image line length, the default number of discarded pels is half the excess number of pels, otherwise Fascicle VII.6 - Rec. T.417 19 it is zero. 20 Fascicle VII.6 - Rec. T.417 A.2 Formatted processable raster graphics content architecture class Content pertaining to the formatted processable raster graphics form content architecture class may be associated with basic layout or logical objects. A.2.1Presentation attributes w 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴 � � Attribute � Permissible values � Default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴� � Pel path �0, 90, 180, 270 degrees � 0 degrees � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴� � Line progression �90, 270 degrees � 270 degrees � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴� � Pel spacing �(Any positive integer, � (4,1) SMU � � 쿪ny positive integer) � � � 쿞MU, 'null' � � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴� � Spacing ratio �(Any positive integer, � (1,1) � � 쿪ny positive integer � � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴� � Clipping � � See Note 1 � � First pair �(Any non-negative integer� � � 쿪ny non-negative integer)� � � Second pair �(Any non-negative integer� � � 쿪ny non-negative integer)� � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴� � Image dimensions 쿞ee Note 2 � Automatic � � � � � � Width controlled � � � � Minimum width 쿌ny non-negative integer � � � Preferred width 쿌ny non-negative integer � � � � � � � Height controlled � � � � Minimum height 쿌ny non-negative integer � � � Preferred height 쿌ny non-negative integer � � 쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴� � Area controlled � � � � Minimum height 쿌ny non-negative integer � � � Preferred height 쿌ny non-negative integer � � � Minimum width 쿌ny non-negative integer � � � Preferred width 쿌ny non-negative integer � � � Aspect ratio flag 쿣ariable, fixed � � � � � � � Automatique 쿙ull � � 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴� Note 1 - The default value of "clipping" is the first coordinate in the content portion (0,0) and the last coordinate (N-1, L-1), where N is number of pels per line and L is number of lines. Note 2 - Minimum values must not be greater than preferred values. Fascicle VII.6 - Rec. T.417 21 A.2.2Content portion attributes w 旼컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴� � Attribute � Permissible values � Default value � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿙umber of pels per 쿌ny positive integer � None � 쿹ine � � � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿙umber of lines 쿌ny positive integer � None � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿟ype of coding 쿍itman encoding, � Rec. T.6 encoding � � 쿝ec. T.4 encoding (one-dim.), � � � 쿝ec. T.4 encoding (two dim.), � � � 쿝ec. T.6 encoding � � 쳐컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴� 쿎ompression 쿎ompressed, uncompressed as � Compressed as in � � 쿶n Rec. T.6 � Rec. T.6 � � � � See Note � 읕컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴� Note - The attribute "compression" is only applicable if the value of the attribute "type of coding" is 'Rec. T.6 encoding' or 'Rec. T.4 two dimensional encoding'. ANNEX B (to Recommendation T.417) Recommendations for the development of raster graphics content architecture levels in document application profiles (Informative) This section provides examples of the definition of four raster graphics content architecture levels, in accordance with the rules specified in Recommendation T.411: - RF-0 is an example of a content architecture level belonging to the formatted form content architecture class. RF-0 is identical to the content architecture used is the context of the document application profile defined in Recommendation T.503. - RF-1 is an example of a content architecture level belonging to the formatted form content architecture class. RF-1 is identical to the content architecture used in the context of the document application profile defined in Recommendation T.501. - RP-0 is an example of a content architecture level belonging to the formatted processable content architecture class. Content pertaining to this level may be laid out using the fixed dimension layout method. - RP-1 is an example of a content architecture level belonging to the formatted processable content architecture class. Content pertaining to this level may be laid out using either the fixed dimension layout method (defined in  10.3) or the scalable dimension layout method (defined in  10.4). 22 Fascicle VII.6 - Rec. T.417 Note - The application profile may have to specify additional rules for the use of these content architecture levels in particular applications. Fascicle VII.6 - Rec. T.417 23 B.1 Raster graphics content architecture level RF-O RF-0 is a content architecture level derived from the formatted form raster graphics content architecture class. B.1.1 Presentation attributes w 旼컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴 � � Attribute � Basic values 쿙on-basic values� Default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Pel path � 0 degrees � None � Standard � � � � � default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Line progression � 270 degrees � None � Standard � � � � � default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Pel transmission � 6 BMU � 5, 4, 3, BMU � Standard � � density � � � default value � 읕컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴� B.1.2Content portion attributes w 旼컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴 � � Attribute � Basic values 쿙on-basic values� Default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Number of pels per line 쿌ny positive 쿙one � Standard � � 쿶nteger � � default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Number of discarded pels쿌ny positive 쿙one � Standard � � 쿶nteger � � default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Type of coding 쿝ec. T.6 encoding쿙one � Standard � � � � � default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Compression 쿬ompressed as in 쿢ncompressed � Standard � � 쿝ec. T.6 쿪s in Rec. T.6 � default value � 읕컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴� B.2 Raster graphics content architecture level RF-1 RF-1 is a content architecture level derived from the formatted form raster graphics content architecture class. B.2.1Presentation attributes w 旼컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴 � � Attribute � Basic values 쿙on-basic values� Default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Pel path � 0 degrees � None � Standard � � � � � default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Line progression � 270 degrees � None � Standard � � � � � default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Pel transmission � 5, 4 BMUs � 6, 3, 2, 1 BMUs� None � � density � � � See Note � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Initial offset � Any integer � None � Standard � � � Any integer � � default value � 읕컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴� 24 Fascicle VII.6 - Rec. T.417 Note - "Pel transmission density" is specified as 'mandatory' for raster graphics content architecture level RF-1. Fascicle VII.6 - Rec. T.417 25 B.2.2Content portion attribute w 旼컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴 � � Attribute � Basic values 쿙on-basic values� Default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Number of pels per line 쿌ny positive 쿙one � None � � 쿶nteger � � See Note � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Type of coding 쿝ec. T.6 encoding쿙one � None � � � � � See Note � 쳐컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴� � Compression 쿎ompressed as in 쿢ncompressed � Standard � � 쿝ec. T.6 쿪s in Rec. T.6 � default value � 읕컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴� Note - "Number of lines per line" and "type of coding" are specified as 'mandatory' for raster graphics content architecture level RF-1. B.3 Raster graphics content architecture level RP-0 RP-0 is a raster graphics content architecture level derived from the formatted processable content architecture class; it is laid out using the fixed dimension method of the processable content layout process. B.3.1Presentation attributes w 旼컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴쩡컴컴컴 컴컴컴컴� � Attribute � Basic values 쿙on-basic values � Default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Pel path �0, 90, 180, 270 degrees � None 쿞tandard � � � � 쿭efault value � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Line progression �90, 270 degrees � None 쿞tandard � � � � 쿭efault value � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Pel spacing �(Any positive integer, � None 쿞tandard � � 쿪ny positive integer) � 쿭efault value � � 쿞MU � � � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Spacing ratio �(Any positive integer, � None 쿞tandard � � 쿪ny positive integer � 쿭efault value � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Clipping � � None 쿞tandard � � First pair �(Any non-negative integer,� 쿭efault 26 Fascicle VII.6 - Rec. T.417 value � � 쿪ny non-negative integer) � � � � Second pair �(Any non-negative integer,� � � � 쿪ny non-negative integer) � � � 읕컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴� Fascicle VII.6 - Rec. T.417 27 B.3.2Content portion attributes w 旼컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴 컴컴� � Attribute � Basic values � Non-basic values � Default value � 쳐컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� 쿙umber of pels 쿌ny positive integer 쿙one 쿙one � 쿾er line � � � � 쳐컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� 쿙umber of lines 쿌ny positive integer 쿙one 쿙one � 쳐컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� 쿟ype of coding 쿝ec. T.6 encoding 쿍itman encoding 쿞tandard � � � 쿝ec. T.4 encoding 쿭efault value � � � �(one-dimensional) � � � � 쿝ec. T.4 encoding � � � � �(two-dimensional) � � 쳐컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� 쿎ompression 쿎ompressed as � Uncompressed as 쿞tandard � 쿞ee Note 쿶n Rec. T.6 � in Rec. T.6 쿭efault value � 읕컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴� Note - The attribute "compression" is only applicable if the value of the attribute "type of coding" is 'Rec. T.6 encoding' or 'Rec. T.4 two dimensional encoding'. B.4 Raster graphics content architecture level RP-1 RP-1 is a raster graphics content architecture level derived from the formatted processable raster graphics content architecture class; it is laid out using either the fixed or scalable dimension methods of the processable content layout process (depending upon the value of "pel spacing"). B.4.1Presentation attributes w 旼컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴쩡컴컴컴 컴컴컴컴� � Attribute � Basic values 쿙on-basic values � Default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Pel path �0, 90, 180, 270 degrees � None 쿞tandard � � � � 쿭efault value � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Line progression �90, 270 degrees � None 쿞tandard � � � � 쿭efault value � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Pel spacing �(Any positive integer, � None 쿞tandard � � 쿪ny positive integer) � 쿭efault value � � 쿽r 'null' � � � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Spacing ratio �(Any positive integer, � None 쿞tandard � � 쿪ny positive integer) � 쿭efault 28 Fascicle VII.6 - Rec. T.417 value � 읕컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴� Fascicle VII.6 - Rec. T.417 29 w 旼컴컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴� � Attribute � Basic values 쿙on-basic values � Default value � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Clipping � � None 쿞tandard � � � � 쿭efault value � � First pair �(Any non-negative integer,� � � � 쿪ny non-negative integer) � � � � Second pair �(Any non-negative integer,� � � � 쿪ny non-negative integer) � � � 쳐컴컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� � Image dimensions 쿞ee Note � None 쿞tandard � � � � 쿭efault value � � Width controlled � � � � � Minimum width 쿌ny non-negative integer � None � � � Preferred width 쿌ny non-negative integer � None � � � � � � � � Height controlled � � � � � Minimum height 쿌ny non-negative integer � None � � � Preferred height 쿌ny non-negative integer � None � � � � � � � � Area controlled � � � � � Minimum height 쿌ny non-negative integer � None � � � Preferred height 쿌ny non-negative integer � None � � � Minimum width 쿌ny non-negative integer � None � � � Preferred width 쿌ny non-negative integer � None � � � Aspect ratio flag 쿣ariable, fixed � None � � � � � � � � Automatic 쿙ull � � � 읕컴컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴� Note - Minimum values must not be greater than preferred values. B.4.2Content portion attributes w 旼컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴 컴컴� � Attribute � Basic values � Non-basic values � Default value � 쳐컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� 쿙umber of pels 쿌ny positive integer 쿙one 쿙one � 쿾er line � � � � 쳐컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� 쿙umber of lines 쿌ny positive integer 쿙one 쿙one � 쳐컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� 쿟ype of coding 쿝ec. T.6 encoding 쿍itman encoding 쿞tandard � � � 쿝ec. T.4 encoding 쿭efault value � � � �(one-dimensional) � � � � 쿝ec. T.4 encoding � � � � �(two-dimensional) � � 쳐컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컴컴컴� 쿎ompression 쿎ompressed as � Uncompressed as 쿞tandard � 쿞ee Note 쿶n Rec. T.6 � in Rec. T.6 쿭efault value � 읕컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴� Note - The attribute "compression" is only applicable if the value of the attribute "type of coding" is 'Rec. T.6 encoding' or 'Rec. T.4 two dimensional encoding'. 30 Fascicle VII.6 - Rec. T.417