Provides a lightweight graph data model for representing,
combining, querying, and summarizing evidence-backed biological
mechanism graphs. A mechgraph is an S3 list holding a node table, an
edge table, and provenance metadata. The package implements builders
that convert STRING and BioGRID interaction tables into mechgraph
objects, combiners (mg_bind(), mg_combine()) that merge graphs while
preserving duplicate evidence records, accessors (mg_nodes(),
mg_edges(), mg_metadata()) and mutators (mg_add_*(), mg_drop_*()) for
node and edge tables, filters by type, source, identifier, and score,
induced-subgraph construction, structural validation (mg_validate()),
and quality-control summaries (mg_qc()).
Szklarczyk et al. (2023)