1.3 An Architectural Overview
1.3 An Architectural Overview
An understanding of the internals of FunnelWeb assists with
understanding its operation. During a single run, FunnelWeb reads
Tutorial
and processes a single input file called the 
input file
 (also called
the 
FunnelWeb file
). The file is processed by passing it through a
Developer
series of stages called 
phases
. The result is that some 
output files
are generated. A 
journal file
 is generated containing a copy of the
Reference
messages that appear on the console during the FunnelWeb run. A
listing file
 is created containing a summary of the run, including
1 Introduction
any error messages. A 
documentation
 file is generated containing
2 Interface
typesetter commands that when fed into a typesetter program will
3 Scanner
result in printed documentation. Finally, one or more 
product files
4 Parser
are generated containing the result of unscrambling the macro
5 Analyser
definitions of the input file.
6 Tangle
7 Weave
8 Shell
     .fw Input File
9 Commands
     (FunnelWeb file)
10 Glossary
            V
       +         +         \
11 References
       | Scanner |         |
       +         +         |
SEARCH
            V              |
        +        +         |
        | Parser |         |
        +        +         |
            V              |
       +          +        >    +        +
       | Analyser |        |    |        |
       +          +        |    |        |
            V              |    |        |
    +       +       +      |    V        V
    V               V      |    |        |
+        +      +       +  |    |        |
| Tangle |      | Weave |  |    |        |
+        +      +       +  /    |        |
    |               |           |        |
    V               V           V        V
 Product      Documentation  Listing  Journal
  Files           File         File    File
FunnelWeb s processing phases
http://www.ross.net/funnelweb/reference/intro_arch.html (1 of 2) [3/3/2000 10:49:26 PM]





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