In efforts to coordinate PEGS survey questions with ontology content, a
combination of manual and semi-automated mappings was conducted. For questions
with binary or categorical, finite responses, manual curation was used to align
a single ontology term to the question (binary) or to each variable response
option (categorical) (Fig. 1A/B). For free response questions, the named
entity recognition tool, OntoRuNER was used to create mappings to ontology terms
for unique answer fields (Fig. 1C).
Ontology abbreviations: FOODON, Food Ontology. CHEBI, Chemical Entities of
Biological Interest.