Skip to main content
When you examine the images, you will notice the following:
  • The name of the Invoice Date field is the short and very common word Date, so narrow the search area as much as possible.
  • If this field is present, its name appears very close to the name of the Invoice Number field.

​
Create the kwInvoiceDate element

1

Create the Static Text element

In the InvoiceHeader element, create a Static Text element and name it kwInvoiceDate.
2

Enter the search text

Click the Static Text tab. In the Search text field, type Date.
3

Set the maximum error percentage

Set Max error percentage to 30, which allows only one error in the four-letter word.
4

Add position relations

Click the Relations tab, click Add, and add relations specifying that the keyword may be no more than 30 dots above the upper boundary of the Invoice Number field name and no more than 700 dots below its lower boundary:
  • Below the upper boundary of the kwInvoiceNumber region, Offset = -30, Reference boundary = Top.
  • Above the lower boundary of the kwInvoiceNumber region, Offset = -700, Reference boundary = Bottom.
When selecting Offset values, examine the geometric properties (boundaries and sizes) of the reference and search image objects in pre-recognition results mode. Use the Measure Rectangle tool to measure distances. Offset values can only be selected by trial and error.
5

Match the FlexiLayout

Temporarily exclude the InvoiceFooter element and match the FlexiLayout.
When you match the FlexiLayout, you will notice the following:
  • On the first page of some documents, several hypotheses are generated for kwInvoiceDate, and sometimes the wrong one is selected. Adjust the element properties to correct the error.
  • The field of interest is closest to the upper edge of the page.

​
Add search constraints to kwInvoiceDate

1

Open the element properties

Open the Properties dialog box for the kwInvoiceDate element.
2

Set the Nearest constraint

Click the Relations tab, select Nearest, and select Page top edge from the To drop-down list.
Screenshot of the Relations tab of the kwInvoiceDate element properties in ABBYY FlexiLayout Studio, showing the Nearest option selected with Page top edge chosen in the To drop-down list to constrain the search.
3

Verify the match

Match the FlexiLayout again to confirm that the name of the Invoice Date field is detected reliably.