The document hierarchy describes the structure of the documents your application is designed to handle. The levels within the hierarchy are batch, document, page, and field.At the top of the document hierarchy is the batch, which refers to all pages of all document types. Beneaththe batch level, the document hierarchy defines:
- The document types your application can process. You may have only one type, or you may have multiple types.
Example: The TravelDocs application processes car rental documents, hotel expense documents, and flight documents.
- The page types within each document type. Each document may have only one page type, or it may havemultiple types.
Example: The car rental document includes the rental agreement page and the optional insurance page, while the flight document has only an air ticket page.
- The number and order of pages within each document type. Pages can be required or optional.
Example: A car rental document has at most two pages. The rental agreement page is required and must come first; the insurance coverage page is optional.
- The data fields within each page type. Data fields too can be required or optional.
Example: The hotel document‟s “Other Charges” page has fields for expense category, number of items, unit cost, and total cost.
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