NER Tagging for Invoices (BIO Format)

Community

@redeipirati with @carly-bartel

This labeling config enables Named Entity Recognition (NER) on invoice documents using the BIO (Beginning, Inside, Outside) format. It combines OCR text recognition with entity tagging for key invoice elements.

Labeling Configuration

<View style="display: flex; align-items: flex-start; gap: 1em;">
  <!-- Left panel: labels + filter -->
  <View style="min-width: 250px; padding: 0.5em; background: #f7f7f7; border-radius: 4px;">
    <Header value="NER Tags" />
    <Labels name="ner" toName="text" showInline="false">
      <Label value="B-NIF"    background="#FF5733" />
      <Label value="B-FORN"   background="#33FF57" />
      <Label value="B-DATA"   background="#3375FF" />
      <Label value="B-VALOR"  background="#FF33A1" />
      <Label value="B-NUMFAT" background="#F3FF33" />
      <Label value="I-NIF"    background="#FF5733" />
      <Label value="I-FORN"   background="#33FF57" />
      <Label value="I-DATA"   background="#3375FF" />
      <Label value="I-VALOR"  background="#FF33A1" />
      <Label value="I-NUMFAT" background="#F3FF33" />
      <Label value="O"        background="#aaa"    />
    </Labels>
  </View>

  <!-- Right panel: text to annotate -->
  <View style="flex: 1; max-height: 80vh; overflow-y: auto;">
    <Text
      name="text"
      value="$ocr"
      granularity="word"
    />
  </View>
</View>

About the labeling configuration

All labeling configurations must be wrapped in View tags.

This configuration uses the following tags:

• Image
• TextArea
• Labels
• View

Usage Instructions

• Text: Text showing the recognized text from the invoice.
• BIO Format Labels:
  • B- prefix: Beginning of an entity
  • I- prefix: Inside/continuation of an entity
  • O: Outside/not part of any entity
• Entity Types:
  • NIF: Tax identification number
  • FORN: Supplier information
  • DATA: Date information
  • VALOR: Amount/Value
  • NUMFAT: Invoice number