# RCSB_EXDB HISTORY
18-Mar-2019 V0.10 Initial version
22-Apr-2019 V0.11 Refining API, separate mock tests fro full cache tests, add taxonomy coverage accessors
23-Apr-2019 V0.12 Consolidated rcsb.exdb.seq into this more general module  (IN PROGRESS)
25-Jun-2019 V0.13 Update development workflows and cleanup
28-Jun-2019 V0.14 Migrating code from py-rcsb_utils_anal module for entity instance extraction
 4-Sep-2019 V0.15 Added tree, chemical reference loader operations and pipeline build tooling
17-Sep-2019 V0.16 Update to latest schemas
30-Sep-2019 V0.17 Updates for chemical reference and tree cli's and update dependencies
15-Oct-2019 V0.18 Refactor, add TaxonomyExtractor(), ReferenceSequenceAssignmentUpdater() and friends.
16-Oct-2019 V0.19 Checkpoint in improving update reference sequences and troubleshooting tree node lists for ATC
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