Quoted text is from 
<[email protected]>, by 
Samantha Scott <[email protected]>

>The basics:
>You take the field that has the data you want and you use the mapper to 
>direct it to the field on your output where you want it to appear.

Dinakar

The above is fair comment; since the actual mapping operation is 
completely dependent on the product you use.

To illustrate what is involved you could consider the mapping process as 
it was implemented in TIE ETC 2.x. You provide a description of your 
input and output file formats; the hierarchy, records, fields and 
properties. You then have a script which reads the input file and 
creates the output file. In the case of ETC the scripting language is 
quite powerful and enables you to do clever things; it is a program 
which you have to write.

There are other more visual tools in which, whilst you still have to 
define the input and output, you can drag and drop data elements from 
input to output. The mapper then automatically generates the equivalent 
of the script which performs the data movement. In many cases you will 
have to complement this with 'code escapes', since in the real world 
there will be conditions attached to the data movement.

If you start working with a particular product you will undoubtedly feel 
that this description is a gross over-simplification. Such is life.

Regards
Chris
-- 
Chris Johnson  mobile:+44 (0)7785 302122 Fax: +44 (0)870 0519 818
EDI website    http://www.edimatrix.co.uk
EDIMatrix Ltd  work: 0845 126 0680 or +44 20 8778 1402
Registered in UK no. 2777624 Reg.Office: 34 Sydenham Rd, London SE26 5QF


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