Module 6: How to Search PubChem for Chemical Information (Part 2) | DivCHED CCCE: Cheminformatics OLCC

PubChem subgraph fingerprints,

Why are these called a "Subgraph"? I see this from , [wikipedia](https://en.wikipedia.org/wiki/Glossary_of_graph_theory_terms#subgraph). Is it that each bit of the fingerprint represents a subgraph of the molecule, which in it self is the graph? That is, its existance/nonexistance of this subset within the entire?.

Item URL: 
https://hypothes.is/a/4AFm6iHlEeeDvDcRw5bWVg