how to handle multiple items in detail section

Hi,
I'm trying to evaluate the 17.5 trila SDK. while reading documents, I don't see how to process multiple items in invoice detail section. say an invoice have 3 items, each one has line number, qty, UOM, description, price. do you have sample code for this?
besides, what's the general accuracy percentage for form processing?

thanks.

If you mean you have a master form for an invoice, and different invoices will have similar header and footer but different number of items, you can try the following:
1. Define all the fixed areas to be recognition fields. This includes the header parts, the footer parts, and also the table header (words like Qty, Description, Price, etc.).
2. For the detail part, define each one as a zone, which can be either filled or empty.

What I mean by point #2 is if you have space for 10 lines in the invoice, and each line spans 5 columns, you can define 50 zones to cover them all then when a form is recognized, you can check each one of these 50 fields to see if it contains any data.