Videotex Mapping
Carapace Videotex mapping is performed by constructing page definitions.
Amongst other things, the page definition defines the following:
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a name for the page
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the method to identify this page -- and to discriminate it from all other pages on the
service
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a test to determine if the page is complete and that mapping may start
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the areas on the screen used for the input of data by the user
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the areas of the screen which hold important information -- e.g. the booking
reference for a holiday
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a method to extract data from the page and re-format it into a more useful format
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various triggers which fire when particular conditions are satisfied -- e.g. raise an event
signifying the receipt of a new Videotex page
The page definitions and their trigger functions allow the mapping of Videotex services
by the XML Server to be done in a consistent and extensible way.
If a Videotex service adds a new page or modifies an existing one, then a new page definition
along with its triggers can be created or an existing one modified.
To summarise:
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The XML Server understands how Videotex services operate.
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The page definitions and their triggers define what to do with the data on that
particular service.