Update from Crossref snapshot 2026-07 (artifact f7eacd92e4bde1653f19d01da83fe19beb0ca45a4399f7296eaee1ad1655f93f)

README.md

@@ -56,10 +56,12 @@ version 2.2.0.
 
 ### Provenance and Ambiguity Policy
 
-- `publisher` and `crossref` matches come from references whose DOI was
-  asserted by the publisher or matched by Crossref. `mined` matches were
-  extracted from unstructured reference text: DOIs, arXiv identifiers, and
-  landing-page URLs.
+- `publisher` and `crossref` matches come from references whose structured
+  `DOI` field holds the cited DOI with a `doi-asserted-by` value of
+  `publisher` or `crossref`. Every other match is `mined`: a DOI, arXiv
+  identifier, or registered landing-page URL found in the reference's `DOI`
+  (without that assertion), `URL`, `article-title`, `journal-title`, or
+  `unstructured` field.
 - A landing-page URL registered by more than one DataCite record never
   produces a citation. Such references are published separately in the
   `ambiguous_urls` configuration with every candidate DOI and are excluded
@@ -71,11 +73,11 @@ version 2.2.0.
 
 | Config | Description | Cited Works | Citing Works | Reference Matches |
 |--------|-------------|-------------|--------------|-------------------|
-| `all` | All confirmed citations (default) | 1,715,770 | 7,426,049 | 7,515,087 |
+| `all` | All confirmed citations (default) | 1,715,666 | 7,373,206 | 7,420,027 |
 | `asserted` | Citations whose DOI was asserted by the publisher or matched by Crossref | 582,302 | 1,269,805 | 1,277,754 |
-| `mined` | Citations extracted from unstructured reference text | 1,325,905 | 6,157,532 | 6,237,333 |
+| `mined` | Citations mined from reference metadata without a publisher or Crossref DOI assertion | 1,325,785 | 6,104,684 | 6,142,273 |
 
-The `ambiguous_urls` configuration holds 47,808 unresolved
+The `ambiguous_urls` configuration holds 2,631 unresolved
 URL references. It is evidence for downstream resolution, not citations, and
 it is excluded from the counts above.
 
@@ -85,7 +87,7 @@ it is excluded from the counts above.
 |-------|-------|
 | Crossref snapshot | `2026-07` |
 | DataCite release | `2026-07` |
-| Run identity fingerprint | `6ef72a4272487c1b91c8481aec59b37bef7fc5b862c9f6194f3415d2a2a26d42` |
+| Run identity fingerprint | `f507938de2061f378eede88fccffc72bb5708f350e9677bb8e6edfd40e75f9d5` |
 | Extractor version | `2.2.0` |
 | Artifact manifest | `metadata/pipeline-manifest.json` |
 
@@ -130,7 +132,7 @@ Each match contains:
 |-------|------|-------------|
 | `provenance` | string | How this match was obtained (see below) |
 | `match_type` | string | What was matched: `doi`, `arxiv`, `url` |
-| `raw_match` | string | The exact substring that matched |
+| `raw_match` | string | The exact reference text that matched (a substring, or a whole structured value) |
 | `reference` | struct | The Crossref reference metadata (string-valued fields; absent keys are null) |
 
 ### `ambiguous_urls`
@@ -146,9 +148,9 @@ Each match contains:
 
 ### Provenance Values
 
-- `publisher` - the reference carries an explicit DataCite DOI with `doi-asserted-by: publisher`
-- `crossref` - the reference carries an explicit DataCite DOI with `doi-asserted-by: crossref`
-- `mined` - the identifier was extracted from unstructured reference text
+- `publisher` - the reference's structured `DOI` field holds the DataCite DOI with `doi-asserted-by: publisher`
+- `crossref` - the reference's structured `DOI` field holds the DataCite DOI with `doi-asserted-by: crossref`
+- `mined` - any other match: a DOI, arXiv identifier, or registered landing-page URL found in the reference's `DOI`, `URL`, `article-title`, `journal-title`, or `unstructured` field (a structured `DOI` counts as mined unless `doi-asserted-by` is `publisher` or `crossref`)
 
 The `asserted` config contains only `publisher` and `crossref` matches; the
 `mined` config contains only `mined` matches.
@@ -176,13 +178,16 @@ registered by several records are recorded as ambiguous evidence instead.
 - Landing-page matching uses the URLs registered in the DataCite release
   `2026-07`; earlier or historical URLs of a record are not
   matched.
+- Registered landing pages on DOI resolver hosts (`doi.org`, `dx.doi.org`,
+  `www.doi.org`), bare site roots, and hosts without a dot are ignored for
+  URL matching, so records registered with such a URL are matched only by DOI.
 - The dataset reflects one Crossref snapshot and one DataCite release; each
   publication replaces the previous contents rather than accumulating them.
 - References whose URL is registered by several DataCite records appear only
   in `ambiguous_urls` and are never counted as citations.
 - Reference parsing depends on successful identifier extraction from
-  unstructured references; the `mined` subset may contain lower-quality
-  matches from noisy reference text.
+  reference metadata; the `mined` subset may contain lower-quality matches
+  from noisy reference text.
 
 ## License
 

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