Henk-Jan

> > > 2. Which versions exist of X12?
> > >   
> > Many, and yes, the transaction set definitions can differ quite a bit 
> > across different versions/releases.
> Let's if I udnrstand this:
> a ISA version 00401 with message orders (850)  is different from the
> same 850 in a ISA version 00303??

The changes can be very small - dropped segments, added segments, 4010 added 8 
digit dates, elements can be made bigger, etc.

There are lots of samples online - many TPs (Trading Partners) will publish 
their changes.

> > > 5. I do not understand 'bounded groups'.
> > >   
> > Yes, they are used. Bounded loops are groups of segments that may 
> > repeat. The first instance of a bounded loop is preceded by an LS 
> > segment, and the last instance is followed by an LE segment. In 
> > practical terms for implementing a translator, I think you probably 
> > don't need to do anything special to handle them. They are defined in 
> > the standard to prevent a condition in transaction set instances called 
> > "segment collision", in which a parser might not otherwise know
> where it 
> > is without the inclusion of the LS and LE segments.
> 
> OK.
> But I still do not understand it.

I haven't seen them yet, but this is my interpretation:
They are used to explicitly mark the beginning (LS - Loop Start) and end (LE - 
Loop End) of a group of segments.
Example: When sending addresses, we use N1,N2,N3,N4 segments for the Name, More 
name, Address, City, etc...  There can be multiple sets of N1..4.

The LS/LE _CAN_ be used to delimit these segments...  but in this particular 
case, are not.  ie.  LS,N1,N3,N4,LE LS,N1,N3,N4,LE




Earl Wertheimer
[EMAIL PROTECTED]
http://www.spe-edi.com



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