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Annotation of 43BSDReno/contrib/isode-beta/ftam/fadu.py, revision 1.1

1.1     ! root        1: -- fadu.py - FTAM file-access-data-unit definitions
        !             2: --     lifted directly from ISO8571-2
        !             3: --
        !             4: --      Two kinds of changes to the ASN.1
        !             5: --         - more commentary-tags for POSY
        !             6: --         - Node-Name must be string-valued
        !             7: 
        !             8: -- $Header: /f/osi/ftam/RCS/fadu.py,v 7.0 89/11/23 21:53:15 mrose Rel $
        !             9: --
        !            10: --
        !            11: -- $Log:       fadu.py,v $
        !            12: -- Revision 7.0  89/11/23  21:53:15  mrose
        !            13: -- Release 6.0
        !            14: -- 
        !            15: 
        !            16: --
        !            17: --                               NOTICE
        !            18: --
        !            19: --    Acquisition, use, and distribution of this module and related
        !            20: --    materials are subject to the restrictions of a license agreement.
        !            21: --    Consult the Preface in the User's Manual for the full terms of
        !            22: --    this agreement.
        !            23: --
        !            24: --
        !            25: 
        !            26: 
        !            27: --* ISO8571-FADU *-- FADU DEFINITIONS ::=
        !            28: 
        !            29: %{
        !            30: #ifndef        lint
        !            31: static char *rcsid = "$Header: /f/osi/ftam/RCS/fadu.py,v 7.0 89/11/23 21:53:15 mrose Rel $";
        !            32: #endif
        !            33: %}
        !            34: 
        !            35: BEGIN
        !            36: 
        !            37: Subtree ::=
        !            38:         SEQUENCE {
        !            39:             node
        !            40:                 Node-Descriptor-Data-Element,
        !            41: 
        !            42:             data[0]
        !            43:                 IMPLICIT DU
        !            44:                 OPTIONAL,
        !            45:                -- present if and only if a DU is connected to the node
        !            46: 
        !            47:             children[1]
        !            48:                 IMPLICIT Children
        !            49:                 OPTIONAL
        !            50:                -- a leaf node is characterized by having no children
        !            51:         }
        !            52: 
        !            53: Children ::=
        !            54:         SEQUENCE {
        !            55:             enter-subtree
        !            56:                 Enter-Subtree-Data-Element,
        !            57: 
        !            58:            subtree --* *--
        !            59:                 SEQUENCE OF
        !            60:                     Subtree,
        !            61:                -- subtrees must appear in their proper order according to
        !            62:                -- their proper ordering as children of their parent node
        !            63: 
        !            64:             exit-subtree
        !            65:                 Exit-Subtree-Data-Element
        !            66:         }
        !            67: 
        !            68: DU ::=
        !            69:         SEQUENCE OF
        !            70:             --* ISO8571-CONTENTS *-- CONT.File-Contents-Data-Element
        !            71: 
        !            72: Node-Descriptor-Data-Element ::=
        !            73:     [APPLICATION 0]
        !            74:         IMPLICIT SEQUENCE {
        !            75:             name
        !            76:                 Node-Name
        !            77:                 OPTIONAL,
        !            78:                -- present only if the root node of the subtree is a named node
        !            79: 
        !            80:             arc-length[1]
        !            81:                 IMPLICIT INTEGER
        !            82:                 DEFAULT 1,
        !            83:                -- used to specify the length of the arc to the root node of
        !            84:                -- the subtree from its parent node
        !            85: 
        !            86:             data-exists[2]
        !            87:                 IMPLICIT BOOLEAN
        !            88:                 DEFAULT TRUE
        !            89:                -- data-exists = TRUE indicates that a DU is connected to the
        !            90:                -- root node of the subtree
        !            91:         }
        !            92: 
        !            93: Node-Name ::=
        !            94: --*     CHOICE { *--
        !            95: --*         ftam-coded *-- [0]
        !            96:                 IMPLICIT GraphicString --* , *--
        !            97:                -- when ftam-coded is used, the Node-Name belongs to the same
        !            98:                -- abstract syntax as the structuring information.  Node-Names
        !            99:                -- are then transferred in the presentatino context established
        !           100:                -- to support the FTAM FADU abstract syntax.  This form of
        !           101:                -- Node-Name is only allowed when the content type file
        !           102:                -- attribute contains a document type name.  To support this
        !           103:                -- alternative, at least the G0 character set registered in
        !           104:                -- character set register entry 2 shall be supported.
        !           105: 
        !           106: --*         user-coded *--
        !           107: --*             EXTERNAL *--
        !           108:                -- the actual types allowed are found in the abstract syntax
        !           109:                -- for the files contents, as specified in the contents type
        !           110:                -- file attribute for the file
        !           111: --*     } *--
        !           112: 
        !           113: Enter-Subtree-Data-Element ::=
        !           114:     [APPLICATION 1]
        !           115:         IMPLICIT NULL
        !           116: 
        !           117: Exit-Subtree-Data-Element ::=
        !           118:     [APPLICATION 2]
        !           119:         IMPLICIT NULL
        !           120:        -- the enter-subtree and exit-subtree data elements are used to bracket
        !           121:        -- the list of subtrees, which are children of the preceding node
        !           122: 
        !           123: FADU ::=
        !           124:         Subtree
        !           125: 
        !           126: Structuring-Data-Element ::=
        !           127:         CHOICE {
        !           128:            node-descriptor --* *--
        !           129:                 Node-Descriptor-Data-Element,
        !           130: 
        !           131:            enter-subtree --* *--
        !           132:                 Enter-Subtree-Data-Element,
        !           133: 
        !           134:            exit-subtree --* *--
        !           135:                 Exit-Subtree-Data-Element
        !           136:         }
        !           137: 
        !           138: -- Data-Element is defined to be a general data type whose values are
        !           139: --
        !           140: --     a) a value of the ASN.1 type Structuring-Data-Element in the abstract
        !           141: --       syntax "FTAM FADU"; or,
        !           142: --
        !           143: --     b) a value of the ASN.1 type ISO8571-CONTENTS.File-Contents-Data-Element
        !           144: --       in the abstract syntax derived from the contents type file attribute.
        !           145: 
        !           146: END

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