HardMatch: Exact lexical string comparison

This metric aims to evaluate whether a generated label exactly matches any existing label in the gold-standard ontology. If the generated label matches a gold standard label (character-for-character), the result is 1; otherwise it is strictly 0.

Example:

Generate_Label_1: Wine

Generate_Label_2: wine

Generate_Label_3: Liquor

Gold_Standard_Label: Wine

Result:

1. HardMatch(Generate_Label_1, Gold_Standard_Label) = 1
2. HardMatch(Generate_Label_2, Gold_Standard_Label) = 0
3. HardMatch(Generate_Label_3, Gold_Standard_Label) = 0

What is being measured?

This metric strictly compares the generated label to the gold-standard labels at the string level. It is the strictest matching approach with zero tolerance for variation and no semantic component.