Support for Query Fields at Line Item Level (e.g., IGST Rate, IGST Amount in Invoice Items) #123

Description

Currently, the query_fields parameter in the begin_analyze_document API allows us to specify high-level fields such as Address or InvoiceNumber.

For example:

poller = document_intelligence_client.begin_analyze_document(
    "prebuilt-layout",
    AnalyzeDocumentRequest(url_source=formUrl),
    features=[DocumentAnalysisFeature.QUERY_FIELDS],
    query_fields=["Address", "InvoiceNumber"],
)

This works well for document-level fields.

However, I would like to specify query fields for each line item (product) in an invoice. For instance, in the attached sample invoice, I need to extract IGST Rate and IGST Amount for each line item in the product table.

Problem

At the moment, query_fields seems to only work for top-level fields and does not allow targeting fields inside a repeating structure like invoice line items.

Request

• Is there a way to define query fields at the line item (per product) level?

• If not, can support for item-level query fields (e.g., tax percentages, amounts, discounts per line item) be added in a future release?

Example Use Case

For an invoice line item table:

I want to query and extract IGST Rate and IGST Amount along with other line item details.