The BibleWorks Greek Morphology (BGM) schema is, together with its datasets, openly licensed for non-commercial distribution. The schema provides a lightweight, compact means of adding Part of Speech (PoS) tags subsequent to lemmatized words. Each element of the schema occupies a set location within a given sequence. This morphological key elaborates the schema and numbers the respective positions for the sake of clarity. Each option is represented by a single alphanumeric abbreviation dependent on its precursors and position within the sequence.