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## [Unreleased]
+Mostly infrastructure changes: Python, Elasticsearch, and other dependencies
+changed.
+
### Changes
- require Python 3.8 (upgrade from Python 3.7)
+- require Elasticsearch 7.10 (upgrade from 6.x). Queries (reads) will work
+ against ES 6.x, writes will not. 7.10 is the last upstream "open source"
+ version of Elasticsearch, and we intend to stick with it until a community
+ open source fork emerges
+- update all Elasticsearch schemas to v03c. All at least include
+ `doc_index_ts`, and small other changes
+- container Elasticsearch schema includes aggregated release preservation
+ numbers, as well as total count. Indexing pipeline updated to (optionally)
+ query these stats at index-time
+- several improvements to web editing workflow: clearer design of editgroup web
+ view, etc
+- change web UI and labeling on release and file views to emphasize
+ preservation status and archival access
+
+### Added
+
+- display preservation holdings summary on container view page
+
## [0.3.3] - 2020-12-24