Method and system to handle state variables in a document processing language
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United States of America Patent
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Jun 6, 1995
Issued Date -
N/A
app pub date -
Nov 2, 1993
filing date -
Apr 30, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for processing state variables in a hierarchically structured page description language such as SPDL. Each structure level of a document causes the creation of a prologue data structure which is used to keep track of system parameters. As content portions (tokensequence elements) of the document are being processed, a current context of interpretation (CCI) data structure is created which is also used to store parameters of the system. When only a portion of a document is processed for printing or other presentation, it is not necessary to process the entire document which is before the desired portion. Both the prologue data structure and the CCI contain pointers which point to data structures such as a state variable table which contains the values of the state variables.
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