feat: sync all files to v2.3 — samples, docs, notebook, DOI 19265853

- ethno_sample_400.json: regenerated from v2.3 master (400 records, 10 fields)
- ethno_sample_400.parquet: regenerated from v2.3 master
- noise_exclusion_list.txt: updated header to v2.3 (116 entries, 5,287 matching records)
- UPDATE_POLICY.md: v2.2 → v2.3, added changelog (75.4% coverage, CTS worker)
- quickstart.ipynb: DOI 19265853, 'IP whitespace' → 'Patent-Literature Gap'
- Schema: 76,907 records, 24,746 chemicals, 2,313 species, 10 fields
- Coverage: 75.4% SMILES/CID (up from 71.8%)

UPDATE_POLICY.md

@@ -12,12 +12,18 @@ Next scheduled update: Q1 2027.
 - PubChem PUG REST API (CID + Canonical SMILES)
 
 ## Versioning
-Current version: v2.2 (March 2026)
+Current version: v2.3 (March 2026)
 All versions are tagged in this repository.
 
+## v2.3 Changelog
+- PubChem CID/SMILES coverage: 75.4% (up from 71.8% in v2.2)
+- CTS worker resolved 997 additional compounds via PubChem PUG-REST name-to-CID
+- 2,741 records improved in correction pass
+- DOI: 10.5281/zenodo.19265853
+
 ## Buyer Notifications
 All dataset buyers receive email notification when a new version is available.
-Buyers of v2.0 or v2.1 receive the v2.2 update free of charge.
+Buyers of v2.0, v2.1, or v2.2 receive the v2.3 update free of charge.
 
 ## Breaking Changes
 Schema changes are announced minimum 30 days in advance via GitHub Discussions.

noise_exclusion_list.txt

@@ -1,4 +1,12 @@
-5
+# Noise Exclusion List — Ethno-API v2.3
+# 116 generic/non-phytochemical entries excluded from analytical queries.
+# These are elements, solvents, macronutrients, and generic categories
+# present in the USDA Dr. Duke source but not meaningful for phytochemical analysis.
+#
+# Dataset: v2.3 (76,907 records, 24,746 unique chemicals, 2,313 species)
+# Matching records in v2.3: 5,287 (93 of 116 entries found in dataset)
+# DOI: 10.5281/zenodo.19265853
+# Last updated: 2026-03-31
 ACETALDEHYDE
 ACETIC-ACID
 ACETONE

quickstart.ipynb

@@ -95,10 +95,10 @@
    "outputs": [],
    "execution_count": null,
    "source": [
-    "# Q17: IP whitespace candidates — high research signal, low patent activity\n",
-    "# Use case: freedom-to-operate screening\n",
+    "# Q17: Patent-Literature Gap candidates — high research signal, low patent activity\n",
+    "# Use case: IP-Literature Discrepancy screening for drug discovery pipeline gaps\n",
     "# Source: duckdb_queries.sql (Team + Enterprise tier)\n",
-    "whitespace = duckdb.sql(f\"\"\"\n",
+    "gap_candidates = duckdb.sql(f\"\"\"\n",
     "    SELECT\n",
     "        chemical,\n",
     "        MAX(pubmed_mentions_2026)    AS pubmed,\n",
@@ -111,8 +111,8 @@
     "    ORDER BY research_to_patent_ratio DESC\n",
     "    LIMIT 10\n",
     "\"\"\").df()\n",
-    "print('IP Whitespace Candidates (high research, low patents):')\n",
-    "whitespace"
+    "print('Patent-Literature Gap Candidates (high research, low patents):')\n",
+    "gap_candidates"
    ]
   },
   {
@@ -185,11 +185,14 @@
     "  year      = {2026},\n",
     "  publisher = {Ethno-API},\n",
     "  url       = {https://ethno-api.com},\n",
+    "  doi       = {10.5281/zenodo.19265853},\n",
     "  note      = {76,907 records, 24,746 unique chemicals, 2,313 plant species,\n",
     "               10-column schema with PubMed, ClinicalTrials, ChEMBL, and PatentsView enrichment}\n",
     "}\n",
     "```\n",
     "\n",
+    "[![DOI](https://zenodo.org/badge/doi/10.5281/zenodo.19265853.svg)](https://zenodo.org/records/19265853)\n",
+    "\n",
     "**Links:** [ethno-api.com](https://ethno-api.com) · [GitHub](https://github.com/wirthal1990-tech/USDA-Phytochemical-Database-JSON) · [HuggingFace](https://huggingface.co/datasets/wirthal1990-tech/USDA-Phytochemical-Database-JSON)\n",
     "\n",
     "\n",
@@ -203,8 +206,7 @@
     "| Team | €1,349 netto | [**Buy →**](https://buy.stripe.com/14AdR8bkX8kHelQ0zCebu07?utm_source=github&utm_medium=notebook&utm_campaign=launch_2026_03) |\n",
     "| Enterprise | €1,699 netto | [**Contact →**](mailto:founder@ethno-api.com) |\n",
     "\n",
-    "> Gemäß § 19 UStG keine Umsatzsteuer.\n",
-    ""
+    "> Gemäß § 19 UStG keine Umsatzsteuer."
    ]
   }
  ]