Labeling function builders index

This page is an index of all labeling function (LF) builders that are available in Snorkel Flow. See Introduction to labeling functions for more information about LFs and how they are used in Snorkel Flow.

Category	Subcategories
Foundation model based	Warm start Prompt builder
Embeddings based
Search based	Additional Timestamp IP address SQL query
Pattern based	Regex Full text regex Keyword Fuzzy keyword Keyword count Keyword location
Numerical	Field length Numeric Numeric comparator Two attribute numeric Bounding polygon Bounding rectangle
External resource	Dictionary External model Crowdworker
Span based	Span content Span context Span location Span regex
Rich document	Expression Bounding box Span regex proximity Span regex alignment Span regex row Span regex position Span page Span font size
Sequence	Context Keyword Fuzzy keyword Substring expansion Spacy prop Named entity recognition (NER) Entity dictionary Word vector Letter case Regex
Other LFs	Multi-polar Custom Code Suggested