1 files changed, 72 insertions, 0 deletions
diff --git a/notes/issn_meta.md b/notes/issn_meta.md
new file mode 100644
index 0000000..2aa045b
--- /dev/null
+++ b/notes/issn_meta.md
@@ -0,0 +1,72 @@
+
+content comes from martin's scraping tool
+
+plan:
+- filter down to in-scope ISSNs
+    => journal (or synonym/translation) in title?
+    => join with existing ISSN-Ls
+- key metadata
+    => country
+    => language
+    => URL
+    => correct title
+    => print/electric ISSNs
+
+Total size:
+
+    xzcat data.ndjson.xz | wc -l
+    2,141,737
+
+    xzcat data.ndjson.xz | rg -i journal | wc -l
+    136,696
+
+    xzcat data.ndjson.xz | rg -i '(Online)' | wc -l
+    285,292
+
+Other in-scope keywords: "IEEE", "Proceedings"
+
+Blocklist: "Annual report", "Directory of ...", "Business directory ..."
+
+JSON linked data format:
+
+    @graph
+
+        mainTitle: sometimes an array (with different character sets)
+
+Transform to TSV with ISSN-L as first column, JSON of "@graph" as second column:
+
+    # was going to paste but decided not to do it this way
+    #xzcat data.ndjson.xz | jq '."@graph"[] | select(."@type" == "http://id.loc.gov/ontologies/bibframe/IssnL") | .value' -r > issnl_col.txt
+    #xzcat data.ndjson.xz | jq '."@graph"' > graph_col.txt
+
+    xzcat data.ndjson.xz | rg -v "org.elasticsearch.client.transport.NoNodeAvailableException" | python3 issnl_prefix.py | pv -l | sort > issn_meta_issnl_prefix.tsv
+    => 2.14M
+    => NOTE: terminated from json.decoder.JSONDecodeError: Expecting ':' delimiter
+
+    cat data/container_export.json | jq .issnl -r | rg -v ^null | sort -u > fatcat_issnl.txt
+
+    # was: cat issn_meta_issnl_prefix.tsv | rg -i "journal " > issn_meta.journal.tsv
+    cat issn_meta_issnl_prefix.tsv | rg -i "journal " | rg '"url":' | rg -iv "magazine" > issn_meta.journal.tsv
+    join -t $'\t' fatcat_issnl.txt issn_meta_issnl_prefix.tsv > issn_meta.fatcat.tsv
+    cat issn_meta.journal.tsv issn_meta.fatcat.tsv | cut -f2 | sort -u > issn_meta.filtered.json
+
+    wc -l fatcat_issnl.txt issn_meta.*.json
+        147973 fatcat_issnl.txt
+        216673 issn_meta.fatcat.json
+        277076 issn_meta.filtered.json
+        136696 issn_meta.journal.json
+
+    cat issn_meta.journal.tsv issn_meta.fatcat.tsv | cut -f1 | sort -u | wc -l
+    => 197,724
+
+Original "journal" filter would be about 50k new journals. With some narrower
+filters (no "magazine", require a URL defined):
+
+    join -t $'\t' -v 2 fatcat_issnl.txt issn_meta_issnl_prefix.tsv | rg -i "journal " | rg '"url":' | rg -iv "magazine" > issn_meta.new.tsv
+
+    wc -l issn_meta.new.tsv
+    12819 issn_meta.new.tsv
+
+    cut -f1 issn_meta.new.tsv | sort -u | wc -l
+    11773
+