bodylength and checksum calculation

Imported from previous forum

How can I calculate the bodylenght and the checksum.
Do I have to include the trailer tag in the calculation ?

Thank you
Matteo

[ original email was from Ryan Pierce - rpierce@taltrade.com ]
> How can I calculate the bodylenght and the checksum.
> Do I have to include the trailer tag in the calculation ?

You posted this to the FIXML discussion group. FIXML has no concept of body length and checksum; those fields are not in the DTD.