Polycom Car Stereo System PDS 2000 ユーザーズマニュアル

Polycom, Inc. 

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B

Appendix B: Data Parser

This appendix contains a tutorial, examples and a reference guide for creating 
custom data source definition files. Creating a data source definition is an 
advanced topic that requires in-depth knowledge of pattern matching, 
Internet protocols and formats such as HTTP, HTML and particularly XML.
This appendix includes the following sections:
•

Data Source Definition File Overview

A data source definition file contains a single XML <DataSource> element. A 
<DataSource> element contains a single <General> header element, followed 
by one or more <ParsingRule> and/or <DataItem> elements.
When Data Parser opens a definition file, it first reads the <General> element. 
Then it retrieves the data source's data and applies all top-level <ParsingRule> 
elements in the order they appear in the definition file. Finally, it applies all the 
<DataItem> elements, also in order of their appearance
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