CHANGELOG.md

@@ -53,6 +53,9 @@ replacement, and each removed path, column or flag.
   leading dot, `.se` and `.xn--p1ai`, the register's `type` beside it, and a `unicode`
   column holding the form the register displays, so `misc.tld[.рф]` selects the row
   `.xn--p1ai` renders. A delegation the register marks "Not assigned" does not ship.
+- `misc.loglevel` is RFC 5424's severity table: the eight levels a syslog PRI encodes,
+  keyed by the numerical `code` and rendering the `severity` the RFC spells, so
+  `misc.loglevel[3]` and `misc.loglevel[Error]` select one row.
 - `geo.SE` and `geo.US`: five linked tables per country, `region`, `municipality`,
   `locality`, `postal-code` and `street`, weighted by population and address counts
   and built from SCB, GeoNames, Trafikverket NVDB and the US Census Bureau, and an

DATA-LICENSES.md

@@ -19,6 +19,7 @@ Every shipped dataset, its source, its licence and the attribution it asks for.
 | `misc/httpmethod.tsv` | [IANA HTTP Method Registry](https://www.iana.org/assignments/http-methods/) | [public domain](https://www.iana.org/help/licensing-terms) | none required | `data-import/httpmethod.py` |
 | `misc/httpstatus.tsv` | [IANA HTTP Status Code Registry](https://www.iana.org/assignments/http-status-codes/) | [public domain](https://www.iana.org/help/licensing-terms) | none required | `data-import/httpstatus.py` |
 | `misc/language.tsv` | [datasets/language-codes](https://github.com/datasets/language-codes), the [Library of Congress](https://www.loc.gov/standards/iso639-2/) ISO 639-2 register | [PDDL 1.0](https://opendatacommons.org/licenses/pddl/1-0/) | none required | `data-import/language.py` |
+| `misc/loglevel.tsv` | [RFC 5424](https://www.rfc-editor.org/rfc/rfc5424.txt) Table 2, the syslog message severities | facts | none required | `data-import/loglevel.py` |
 | `misc/mimetype.tsv` | [mime-db](https://github.com/jshttp/mime-db), the IANA media type registry with filename extensions | [MIT](https://github.com/jshttp/mime-db/blob/master/LICENSE) | "Copyright (c) 2014 Jonathan Ong, Copyright (c) 2015-2022 Douglas Christopher Wilson" | `data-import/mimetype.py` |
 | `misc/port.tsv` | [IANA Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/) | [public domain](https://www.iana.org/help/licensing-terms) | none required | `data-import/port.py` |
 | `misc/protocol.tsv` | [IANA Protocol Numbers](https://www.iana.org/assignments/protocol-numbers/) | [public domain](https://www.iana.org/help/licensing-terms) | none required | `data-import/protocol.py` |

README.md

@@ -163,14 +163,14 @@ Each locale carries `address`, `color`, `company`, `date`, `email`, `first-name`
 `personnummer` and `samordningsnummer`, `en_US` adds `ssn` and `itin`. `misc`
 carries `car`, `coordinate`, `creditcard` (Luhn-valid), `currency` (ISO 4217),
 `datetime` (RFC 3339), `emoji`, `httpmethod`, `httpstatus`, `language` (ISO 639-1,
-with its 639-2/T code), `mac`, `mimetype`, `objectid`, `port`, `protocol`,
-`territory` (ISO 3166-1), `timezone` (IANA), `tld` (IANA root zone), `useragent` and
-`uuid` (v4). Many carry sub-fields — `misc.currency.symbol`, `misc.territory.alpha2`,
-`misc.httpstatus.code` — which `--list` shows. `car`, `currency`, `httpmethod`,
-`httpstatus`, `language`, `mimetype`, `port`, `protocol`, `territory`, `timezone`,
-`tld` and `useragent` are [tables](#table), so `misc.territory[SE].capital` and
-`misc.currency[Euro].symbol` select a row; `car` and `useragent` carry no key or name,
-so they are drawn from rather than selected in.
+with its 639-2/T code), `loglevel` (RFC 5424), `mac`, `mimetype`, `objectid`, `port`,
+`protocol`, `territory` (ISO 3166-1), `timezone` (IANA), `tld` (IANA root zone),
+`useragent` and `uuid` (v4). Many carry sub-fields — `misc.currency.symbol`,
+`misc.territory.alpha2`, `misc.httpstatus.code` — which `--list` shows. `car`,
+`currency`, `httpmethod`, `httpstatus`, `language`, `loglevel`, `mimetype`, `port`,
+`protocol`, `territory`, `timezone`, `tld` and `useragent` are [tables](#table), so
+`misc.territory[SE].capital` and `misc.currency[Euro].symbol` select a row; `car` and
+`useragent` carry no key or name, so they are drawn from rather than selected in.
 
 `misc.httpmethod`, `misc.protocol` and `misc.port` are IANA's registries.
 `misc.httpmethod` is the eight methods RFC 9110 defines and PATCH; the register's
@@ -191,6 +191,9 @@ its `unicode` the form the register displays, `.рф` for `.xn--p1ai` and the ke
 for an ASCII one, which selects the row too, so `misc.tld[.рф]` renders `.xn--p1ai`. A
 draw spans the whole zone, `.arpa` and `.zuerich` alike, so pin `misc.tld[.com]` where
 a fixture needs one a reader recognises.
+`misc.loglevel` is RFC 5424's eight severities, keyed by the numerical code a syslog
+PRI carries and named by the severity, so `misc.loglevel[3]` and `misc.loglevel[Error]`
+are one row and `misc.loglevel.code` the number beside the name.
 [`DATA-LICENSES.md`](DATA-LICENSES.md) names each table's source and licence.
 
 `misc.timezone` is every zone tzdb gives a shipped territory, from one apiece for most
@@ -1230,6 +1233,11 @@ the Development section below, and who ships a register the four above then draw
   every value names a row instead. A territory the register records no state for
   stands alone, which is `EH` alone, and naming one for it would be a claim
   fejkdata has no business making.
+- **`misc.loglevel` is a table keyed by the code, not a list of names.** A syslog
+  message carries the severity as the number inside its PRI, so the code and the name
+  are one fact and goal 1 draws them together. The `emerg`, `err` and `info` an
+  rsyslog config takes are BSD's spellings, which RFC 5424 writes nowhere, so shipping
+  them would be the hand-written mapping goal 10 keeps out of a sourced table.
 - **`misc.tld` keys carry the leading dot, where other tables key on a bare code.**
   The register spells a TLD `.se` and `misc.territory.tld` already ships it so, which a
   bare key would make two spellings of one fact; `{/misc.tld}` also composes onto a
@@ -1339,6 +1347,7 @@ docker compose run --rm --user "$(id -u):$(id -g)" data-import data-import/geo-u
 docker compose run --rm --user "$(id -u):$(id -g)" data-import data-import/httpmethod.py
 docker compose run --rm --user "$(id -u):$(id -g)" data-import data-import/httpstatus.py
 docker compose run --rm --user "$(id -u):$(id -g)" data-import data-import/language.py
+docker compose run --rm --user "$(id -u):$(id -g)" data-import data-import/loglevel.py
 docker compose run --rm --user "$(id -u):$(id -g)" data-import data-import/mimetype.py
 docker compose run --rm --user "$(id -u):$(id -g)" data-import data-import/names-se.py
 docker compose run --rm --user "$(id -u):$(id -g)" data-import data-import/names-us.py

data-import/loglevel.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+"""Rebuild data/misc/loglevel.tsv from RFC 5424's severity table.
+
+    data-import/loglevel.py [--source URL_OR_FILE] [--cache DIR] [--out FILE]
+
+Table 2 is the whole set, read between the facility table's caption and its own. The
+RFC describes both tables for informational purposes, so a severity is what an
+originator writes rather than something a collector rejects.
+"""
+import argparse
+import re
+import sys
+from pathlib import Path
+
+import source
+import tsv
+
+SOURCE = "https://www.rfc-editor.org/rfc/rfc5424.txt"
+OUT = Path(__file__).resolve().parent.parent / "data" / "misc" / "loglevel.tsv"
+CACHE = Path(__file__).resolve().parent / "cache"
+COLUMNS = ["code", "severity"]
+TABLE = re.compile(r"Table 1\.\s+Syslog Message Facilities(.*?)Table 2\.\s+Syslog Message Severities", re.S)
+ROW = re.compile(r"^ +(\d) +([A-Z][a-z]+): ", re.M)
+EXPECTED = 8
+
+
+def rows(text):
+    table = TABLE.search(text)
+    if not table:
+        sys.exit("the RFC holds no text between the facility and the severity caption; its tables have moved")
+    for code, severity in ROW.findall(table.group(1)):
+        yield {"code": code, "severity": severity}
+
+
+def main():
+    p = argparse.ArgumentParser(description=__doc__.splitlines()[0])
+    p.add_argument("--cache", default=str(CACHE))
+    p.add_argument("--source", default=SOURCE)
+    p.add_argument("--out", default=str(OUT))
+    a = p.parse_args()
+    table = sorted(rows(source.fetch(a.source, a.cache, "rfc5424.txt").decode("utf-8")), key=lambda r: r["code"])
+    codes = [r["code"] for r in table]
+    if codes != [str(i) for i in range(EXPECTED)]:
+        sys.exit(f"the severity table numbers {codes}, not 0 through {EXPECTED - 1}")
+    tsv.write(a.out, COLUMNS, table)
+
+
+if __name__ == "__main__":
+    main()

data/misc/loglevel.json

@@ -0,0 +1 @@
+{ "format": "{severity}", "rows": "loglevel.tsv", "key": "code", "name": "severity" }

data/misc/loglevel.tsv

@@ -0,0 +1,9 @@
+code	severity
+0	Emergency
+1	Alert
+2	Critical
+3	Error
+4	Warning
+5	Notice
+6	Informational
+7	Debug

todo.md

@@ -49,7 +49,6 @@ by a `data-import/` script, as README goal 10 asks.
 
 | Category | Shape | Source | Licence |
 |---|---|---|---|
-| `loglevel` | c | RFC 5424 severities | facts |
 | `ip` v4 documentation ranges, private, CIDR; `ipv6` `2001:db8::/32`; `mac` locally administered | t | RFC 5737, 1918, 9637 | facts |
 | `creditcard` per network: IIN, length, CVV, expiry | T+t | network rules, `{luhn()}` | facts |
 | `bic`, `isin`, `cusip` | t | structure rules | facts |