W4F wrapper architecture

Retrieval Rules

Extraction Rules

Parser

NSL

NSL

NSL

String

String[]

Actor[]

DOM tree

HTML page

title

genre

cast

<MOVIE>

<TITLE>Casablanca</TITLE>

<GENRE>Drama, War, Romance</GENRE><CAST>

<ACTOR>Humphrey Bogart</ACTOR>

<ACTOR>Ingrid Bergman</ACTOR>

...

Mapping to Java objects

Mapping to XML

The Java objects can now be used by any Java application.

ExtractionWizard

Mappingwizard

Mapping Rules

ExtractionEngine

WorldWideWeb

XML document

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