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+
+status: in progress
+
+Coverage UI/UX Enhancements
+===========================
+
+Want to generally enhance the use case of fatcat as a tool for exploring
+preservation coverage of groups of papers.
+
+Specific changes:
+
+- make coverage bar graphs and coverage-by-year charts use preservation codes
+ instead of the current categories
+- container coverage page should have bar coverage by release type (horizontal bars)
+- container coverage page: "volume" chart (like years)
+- coverage search page: enter release query, show coverage stats/graphs
+ => link to "missing releases" search query (TODO)
+ => same basic view as container summary page
+ => parameter: by year or past 60 days
+- show preservation status in release search results (per hit) (TODO)
+- high-level coverage summary pages (TODO)
+ => published papers since 1900
+ => "recent" (last 60 days, by day not year)
+
+Stretch changes:
+
+- update front page with a static (SVG) coverage diagram
+- incorporate summaries in container index (new "enhanced container" index?),
+ for display in search results (along with total count (TODO)
+ => also periodically run a script to update them (daily? weekly?)
+ => calculate these at index update time
+ => rough stats by type: paper, dataset, doc, etc
+
+Not coverage-specific, but update at the same time:
+
+- show summary of release types on container page (as bar, top 4-5 release types)
+- list keepers on container and coverage page (TODO)
+ => with some link? KBART, issn.org keepers
+
+## New Views/URLs
+
+### Container Views
+
+`GET /container/<ident>/stats.json`
+
+Existing endpoint updated with new stats:
+
+- preservation aggregation
+- release type aggregation
+
+`GET /container/<ident>/preservation_by_year.json`
+`GET /container/<ident>/preservation_by_year.svg`
+
+`GET /container/<ident>/preservation_by_volume.json`
+`GET /container/<ident>/preservation_by_volume.svg`
+
+`GET /container/<ident>/preservation_by_type.json`
+
+### Coverage
+
+`GET /coverage`: high-level summary (TODO)
+`GET /coverage/search`: like `/release/search`, but shows aggregates not hits
+
+## Coverage Logic and Fulltext Display
+
+Current preservation codes (no change):
+
+- `bright` (green): in IA or an open archive like arxiv.org, Pubmed Central
+- `dark` (dark green): preserved by a known Keeper, but not in a "bright" archive
+- `shadows_only` (grey/red): not in "bright" or "dark" archive, but in a shadow library
+- `none` (red): no known preservation
+
+Going to update preservation code logic of releases that have no file in IA
+(yet), but do have an arxiv or pubmed central identifier:
+
+- has arxiv id: label as "bright"
+ => and show fulltext link to arxiv
+- pmcid and more than 12 months old: "bright"
+ => and show fulltext link to pmc
+- pmcid and less than 12 months old: "dark"