Media exchange messages are sent and received by tools that
display or edit some kind of media. Specific to the media exchange
messages are values associated with fields. The parts of a Media
Exchange message are defined as follows:
<document>
A vector of bytes with an associated mediaType.
<mediaType>
The name of a media format. The mediaType allows messages
about that document to be dispatched to the right editor. Standard
mediaTypes include those listed in Table 20-7.
 |
| |
|
 | NOTE: The mediaType list will be extended as required. You
can extract a list of the installed mediaTypes from the ToolTalk
Types Database. |
|
| |
|
Table 20-7 Standard
Media Types
| Name of Format | Description | Company |
|---|
| ISO_Latin_1 | ISO 8859-1 (+TAB+NEWLINE) | ISO |
| EUC | Multi-National Lang. Supplement | AT&T |
| PostScript | PostScript Lang. Ref. Manual | Adobe |
| TIFF | "TIFF Rev. 5" Technical Memo | Aldus/Microsoft |
| GIF | Graphics Interchange Format | CompuServe |
| XPM | XPM -- The X PixMap Format | Groupe Bull |
| JPEG | | ISO/CCITT |
| JPEG_Movie | | Parallax |
| RFC_822_Message | RFC 822 | NIC |
| MIME_Message | RFC MIME | NIC |
| UNIX_Mail_Folder | | |
| RTF | MS Word Technical Reference | Microsoft |
| EPS | | |
| DT_APPOINTMENT | | HP, Sun, IBM, Novell |
| Sun_CM_Appointment | | Sun |
abstract mediaType
A family of similar mediaTypes, such as flat text or structured
graphics.
vector
A string vtype describing a distance and a direction in a
document. The syntax of vectors varies by abstract mediaType.
locator
A string describing a location in a document. The syntax of
locators varies by abstract mediaType, but should usually be a superset
of vector syntax.
flat text
A family of mediaTypes (such as ISO_Latin_1) that consist
of a sequence of characters from some character set.
Legal vectors for flat text are:
lineVec ::= Line:[-][0-9]+
charVec ::= Character:[-][0-9]+
vector ::= <lineVec>
vector ::= [<lineVec>,]<charVec>
|
Legal locators for flat text are vectors.
time-based media
A family of media types that consist of time-structured data.
Legal vectors for time-based media include:
vector ::= uSeconds:[-][0-9]+
vector ::= Samples:[-][0-9]+
|
Legal locators for time-based media are vectors.
Errors |
|
These definitions are common to all Document and Media Exchange
messages. Any differences or additions will be noted in the man
pages.
The specified size was too big or too small.
The data does not conform to the specified format.
Table 20-8 lists each of the messages that constitute
the ToolTalk Document and Media Exchange Message Set. For details
see the Section 4 man pages.
Table 20-8 ToolTalk
Document and Media Exchange Message Set
| Message | Description |
|---|
| Deposit (Request) | Saves the document to its backing store. |
| Display (Request) | Displays a document. |
| Display, Edit (Request) | Loads an X11 selection for display or edit. |
| Edit (Request) | Edits or composes a document. |
| Print (Request) | Prints a document. |
| Translate (Request) | Translates a document from one media type to
another media type. |
Printable version
