Tsert.Com 

Tsert.Com XTractor©®

The Tsert Extractor toolkit, Tsert-XTractKit©® provides a simple interface to help a developer with the extraction of information from any wire service. The transmitted data can be in raw form (text or binary), or any other format defined by our protocol description language. The decoded information can then be converted into a given set of formats, such as HTML, XML, our Tsert XML DTD,  etc.

The Tsert DTD, for the extractor, simply maps the transmitted data into a simple uniform way of representing the said data. The developer can then use methods in our toolkit to extract any part of that information, or feed that XMLed encoded data to any application that can then display the information. The extracted information can be stock data, news headlines, etc.

The classes and methods of the Tsert Extractor toolkit are generic enough that other protocols, such as TCP/IP, ISDN, Frame Relay, etc. can be specified and tested.

The way wire services package their information is referred to as a protocol. A protocol usually consists of a set of  frames. A frame, also called Protocol Data Unit (PDU), is a single block of information specifying a single message, e.g. stock data for a particular company provided by stock exchanges. Each frame has one or more fields, each field may have one or more subfields.

For example,
using the following information taken from
the sgxTraders wire service.

A 5-min nikkei data in TradeStation format

"Date","Time","O","H","L","C"

01/06/1997,0755,19320,19325,19260,19270 01/06/1997,0800,19250,19285,19230,19280 01/06/1997,0805,19270,19270,19200,19230

We get the following protocol:

Protocol	Frame/Pdu
TradeStation	Nikkei

Field Name	Type	Delim
Date	string	","
Time	string	","
Open	string	","
High	string	","
Low	string	","
Current	string	","

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