How to extract line items from tables on multiple pages for document parser API in Java and PDF.co Web API

What is PDF.co Web API? It is the Rest API that provides set of data extraction functions, tools for documents manipulation, splitting and merging of pdf files. Includes built-in OCR, images recognition, can generate and read barcodes from images, scans and pdf.

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ByteScoutWebApiExample.iml

      
<?xml version="1.0" encoding="UTF-8"?> <module type="JAVA_MODULE" version="4"> <component name="NewModuleRootManager" inherit-compiler-output="true"> <exclude-output /> <content url="file://$MODULE_DIR{code}quot;> <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" /> </content> <orderEntry type="inheritedJdk" /> <orderEntry type="sourceFolder" forTests="false" /> <orderEntry type="library" name="com.google.code.gson:gson:2.8.1" level="project" /> <orderEntry type="library" name="com.squareup.okhttp3:okhttp:3.8.1" level="project" /> </component> </module>

MultiPageTable-template1.yml

      
--- # Template that demonstrates parsing of multi-page table using only # macro expressions for the table start, end, and rows. # If macro expression cannot be written for every table row (for example, # if the table contains empty cells), try the second method demonstrated # in `MultiPageTable-template2.yml` template. templateVersion: 3 templatePriority: 0 sourceId: Multipage Table Test detectionRules: keywords: - Sample document with multi-page table fields: total: expression: 'TOTAL{{Spaces}}({{Number}})' dataType: decimal tables: - name: table1 start: # macro expression to find the table start in document expression: 'Item{{Spaces}}Description{{Spaces}}Price' end: # macro expression to find the table end in document expression: 'TOTAL{{Spaces}}{{Number}}' row: # macro expression to find table rows expression: '{{LineStart}}{{Spaces}}(?<itemNo>{{Digits}}){{Spaces}}(?<description>{{SentenceWithSingleSpaces}}){{Spaces}}(?<price>{{Number}}){{Spaces}}(?<qty>{{Digits}}){{Spaces}}(?<extPrice>{{Number}})' # output data types for columns columns: - name: itemNo type: integer - name: description type: string - name: price type: decimal - name: qty type: integer - name: extPrice type: decimal multipage: true

MultiPageTable-template2.yml

      
--- # Template that demonstrates parsing of multi-page table without using # macro expression for table rows. Rows and cells are extracted automatically # by specified column coordinates. Use `Template Editor` app to find the coordinates # (coordinates of the mouse cursor are displayed in the toolbar). templateVersion: 3 templatePriority: 0 sourceId: Multipage Table Test detectionRules: keywords: - Sample document with multi-page table fields: total: type: regex expression: 'TOTAL{{Spaces}}({{Number}})' dataType: decimal tables: - name: table1 # coordinate OR macro expression to find the table start on each document page start: #y: 136 expression: 'Item{{Spaces}}Description{{Spaces}}Price' # coordinate OR macro expression to find the table end on each document page end: #y: 787 expression: (Page {{Digits}} of {{Digits}})|(TOTAL{{Spaces}}{{Number}}) # left coordinate of the table (optional) left: 51 # right coordinate of the table (optional) right: 528 # column names, output data types and coordinates (left column edge) columns: - name: itemNo x: 51 type: integer - name: description x: 102 type: string - name: price x: 324 type: decimal - name: qty x: 396 type: integer - name: extPrice x: 441 type: decimal multipage: true

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