priorities:
- coverage stats, particularly for longtail
- `is_active` coverage
- clean out invalid ISSN-L from fatcat
- don't list dead URLs in fatcat
- SIM missing/bad ISSNs
    Counter({'total': 14860, 'inserted': 11421, 'missing-issn': 2863, 'no-match': 555, 'duplicate': 21})


## Sources

- preservation coverage
    x  hathitrust (huge!)
        https://www.hathitrust.org/hathifiles_description
    x  PKP PLN (ONIX)
        https://pkp.sfu.ca/pkp-pn/
        http://pkp.sfu.ca/files/pkppn/onix.csv
    => Scholars Portal (canada)
        received ONIX XML, hoping for KBART format
    => Cariniana
    => National Digital Preservation Program, China
    => Library of Congress
- additional hathitrust (many more ISSNs/journals)
- unpaywall journal-level classification (OA color)
    => ask for journal-level dump or do munging
- jurn matches
    => somebody on github did an openrefine match
- public scopus list (?)
- scrape/munge public clarivate dumps
- repositories (?)
- datacite metadata (?)
    => via munging
- dblp conferences/series
    => no container-only metadata dump available?
- SERP homepage munging
- currated quality lists (eg, national libraries)
- "GOLD" importer (for scopus/WoS)
- PKP OJS index
    => mostly redundant with DOAJ?

improvements:
- sherpa/romeo refactor (no moreo updates)
- entrez refactor (no moreo updates)
- entrez: "NLM Unique Id"
- JURN: finish 
- crossref: empty string identifiers?

## Code / Behavior

- black (syntax)
- log out index issues (duplicate ISSN-L, etc) to a file
- flag to delete old table/rows when loading (?)
- fully automated updates, cron, luigi/gluish style
    => downloads/uploads source metadata files
- check that all fields actually getting imported reasonably
- efficient fatcat export
    => filters for changes to make
    => not really necessary, fatcat importer already skips

## Schema

- `original_name`
- `platform` column in database
- `container_type` column in database
    => munge this in various ways
    => if title is "blah,  Proceedings of the", set type to proceedings and re-write title
    => if title like "Workshop on", set type
- imprint/publisher distinction (publisher is big group)
- summary table should be superset of fatcat table
- `update_url_status` (needs re-write) (?)