tighter README

README.md

@@ -17,47 +17,44 @@ tags:
 - IEEE-802
 - Bluetooth
 - DOCSIS
-pretty_name: Telecom Knowledge Base v15 (flat)
+pretty_name: Telecom Knowledge Base
 ---
 
-# Telecom Knowledge Base v15
+# Telecom Knowledge Base
 
-Unified knowledge graph for the telecommunications industry, built from wikidata
-+ SDO (Standards Development Organization) catalogs. **Flat tabular format** —
-one row per (subject, statement, qualifier) triple, matching the canonical
-`wikidata_formatted` schema. No consolidation, no property selection on the
-wikidata side.
+Knowledge graph for the telecommunications industry — **wikidata entities +
+SDO standards catalogs**, in flat tabular form (one row per
+subject/statement/qualifier triple).
 
-## Volumes
+## At a glance
 
-- **4,679,389 rows** (statement-qualifier denormalized)
-- ~301,949 distinct subjects
-- 162 MB on disk (zstd parquet)
+- **4,679,018 rows**, **301,949 distinct subjects**, 16 columns
+- **162 MB** parquet (zstd)
+- File ordered to put leading telcos (Vodafone, Deutsche Telekom, Verizon, Orange, BT…), then equipment vendors (Nokia, Ericsson, Huawei, Cisco, Qualcomm…), then headline 3GPP specs (TS 38.211, 23.501, 24.501…), then famous IETF RFCs (RFC 791 IP, RFC 793 TCP, RFC 9000 QUIC…), then telecom patents — at the very top of the file. The rest follows by `source` then numeric Q-ID.
 
 ## Schema (16 columns)
 
-| column | type | content |
-|---|---|---|
-| `statement_id` | string | wikidata statement ID (e.g. `Q1418$58eb7bf6-…`); synthetic md5 for non-wikidata sources |
-| `source` | string | `wikidata` / `IETF` / `3GPP` / `ITU-T` / `Bluetooth` / `CableLabs` |
-| `subject_id` | string | wikidata Q-ID or `STD:<SDO>:<id>` for standards |
-| `subject_label` | string | canonical English label |
-| `subject_description` | string | English description |
-| `subject_instance_of_ids` | string | pipe-separated P31 Q-IDs |
-| `subject_instance_of_labels` | string | pipe-separated P31 labels |
-| `property_id` | string | P-ID (e.g. `P31`, `P50`, `P577`, `P1476`, …) |
-| `property_label` | string | property's English label |
-| `value_id` | string | Q-ID or string value |
-| `value_label` | string | value's English label |
-| `value_type` | string | `wikibase-entityid` / `string` / `time` / `monolingualtext` / `url` |
-| `qualifier_property_id` | string | qualifier P-ID (may be empty) |
-| `qualifier_property_label` | string | qualifier property label |
-| `qualifier_value_id` | string | qualifier value (Q-ID or string) |
-| `qualifier_value_label` | string | qualifier value label |
-
-A statement with N qualifiers becomes N rows (each with the same
-`statement_id`); a statement with no qualifier becomes 1 row with empty
-qualifier fields.
+| column | meaning |
+|---|---|
+| `statement_id` | wikidata statement ID; synthetic md5 for non-wikidata sources |
+| `source` | `wikidata` / `IETF` / `3GPP` / `ITU-T` / `Bluetooth` / `CableLabs` |
+| `subject_id` | wikidata Q-ID or `STD:<SDO>:<id>` |
+| `subject_label` | canonical English label |
+| `subject_description` | English description |
+| `subject_instance_of_ids` | pipe-separated P31 Q-IDs |
+| `subject_instance_of_labels` | pipe-separated P31 labels |
+| `property_id` | P-ID (`P31`, `P50`, `P577`, `P1476`, …) |
+| `property_label` | property label |
+| `value_id` | Q-ID or string value |
+| `value_label` | value label |
+| `value_type` | `wikibase-entityid` / `string` / `time` / `monolingualtext` / `url` |
+| `qualifier_property_id` | qualifier P-ID (may be empty) |
+| `qualifier_property_label` | qualifier label |
+| `qualifier_value_id` | qualifier value |
+| `qualifier_value_label` | qualifier value label |
+
+A statement with N qualifiers becomes N rows sharing the same `statement_id`;
+a statement with no qualifier is one row with empty qualifier fields.
 
 ## Sources
 
@@ -72,89 +69,74 @@ qualifier fields.
 
 ## Wikidata side
 
-All properties of every kept subject are preserved — no property selection.
-The pipeline filtered out *entities* (radio-personality humans, ships, etc.)
-but never dropped any individual statement from a kept entity.
+All wikidata properties of every kept subject are preserved — **no property
+selection**. The pipeline filters out *entities* (e.g. radio-personality humans,
+ships, off-topic content stubs) but never drops individual statements from a
+kept entity.
 
-Pipeline summary:
-1. 75 hand-curated telecom anchor classes (telco / ISP / MNO / broadcaster / radio-TV station / satellite / transmitter / codec / communication protocol / standards body / …).
-2. P279 BFS walk → 6,448 telecom-related classes after cleanup.
-3. P31 entity scan → 95K hits.
-4. Property-based expansion via P452 / P101 / P106 / P921 / P136 / P1056 → 127K.
-5. Cascade via P108 / P127 / P137 / P749 / P176 / P361 / P488 / P169 / P3320 / P710 → 200K.
-6. Concept-anchor patch (MIMO, OFDM, RSRP, IEEE 802.11n/ac/ax, Shannon-Hartley, AWGN, AMF…) → 305K.
-7. Weak-area patch (telecom pioneers, ITU-T codecs, country regulators, SDN/NFV, mobile OS) → 390K.
-8. Cleanup filters (content stubs, personality humans, ships, football matches, train stops) → **287,535 final wikidata subjects**.
+Build summary: 75 hand-curated telecom anchor classes → P279 BFS walk → 6,448
+classes → P31 entity scan → property-based expansion (P452 / P101 / P106 / P921
+/ P136 / P1056) → anchor cascade (P108 / P127 / P137 / P749 / P176 / P361 /
+P488 / P169 / P3320 / P710) → concept-anchor patch (MIMO, OFDM, RSRP, IEEE
+802.11n/ac/ax, Shannon-Hartley, AWGN, Friis, …) → weak-area patch (pioneers,
+ITU-T codecs, country regulators, SDN/NFV, mobile OS) → cleanup filters →
+**287,535 wikidata subjects**.
 
 ## Standards side
 
 | SDO | Source | Notes |
 |---|---|---|
-| IETF | `rfc-editor.org/rfc-index.xml` | full bulk metadata: title, authors, year/month, status, abstract, obsoletes/-by, keywords |
-| 3GPP | `3gpp.org/ftp/Specs/archive/` + `3gpp.org/dynareport` | 91% titles + last_modified + per-version date |
+| IETF | `rfc-editor.org/rfc-index.xml` | full metadata: title, authors, year/month, status, abstract, obsoletes/-by, keywords |
+| 3GPP | `3gpp.org/ftp/Specs/archive/` + `3gpp.org/dynareport` | 91 % titles + last_modified + per-version date |
 | ITU-T | `itu.int/itu-t/recommendations` per series | std_id + series |
 | Bluetooth SIG | `bluetooth.com/specifications/specs/` | title + url |
 | CableLabs / DOCSIS | `cablelabs.com/specifications` | title + url |
 
-Standards metadata was mapped onto a small wikidata-aligned property subset (13
-P-IDs) — see qualifying note below.
-
-**Note on standards property mapping** — SDO catalog fields were translated
-into the following 13 canonical wikidata properties for schema alignment:
-`P31` (instance of), `P1476` (title), `P577` (publication date), `P361` (part
-of), `P953` (full work URL), `P50` (author), `P155 / P156` (follows / followed
-by), `P393` (edition number), `P348` (software version id), `P407` (language),
-`P5008` (status), `P1683` (quotation). Wikidata-side rows retain their full
-original property set unchanged.
-
-The native per-SDO catalog parquets (with the original field structures
-preserved verbatim) live alongside the unified table on the upstream pleiasdata
-server.
+Standards rows use a **13-property wikidata-aligned subset** (P31, P1476 title,
+P577 date, P361 part-of, P953 URL, P50 author, P155/P156 follows/-by, P393
+edition, P348 version, P407 language, P5008 status, P1683 abstract) — a
+deliberate schema alignment to make standards joinable against the wikidata
+rows. Native per-SDO catalog parquets with all original fields are preserved
+upstream.
 
-Not ingested (JS-rendered SDO pages): ETSI, GSMA, IEEE Get Program.
+Not ingested (JS-rendered SDO catalogs): ETSI, GSMA, IEEE Get Program.
 
 ## Subject-ID convention
 
-- `Q…` — wikidata entity (real Q-ID)
-- `STD:IETF:RFC0791` — IETF RFC 0791
-- `STD:3GPP:TS_38.211` — 3GPP TS 38.211
-- `STD:ITU-T:G.711` — ITU-T G.711
-- `STD:Bluetooth:…`, `STD:CableLabs:…`
+- `Q…` — wikidata entity
+- `STD:IETF:RFC0791`, `STD:3GPP:TS_38.211`, `STD:ITU-T:G.711`,
+  `STD:Bluetooth:…`, `STD:CableLabs:…` — standards
 
-Synthetic instance-of classes for SDO docs that have no wikidata Q-ID
-counterpart: `SYN:3GPP-TS`, `SYN:3GPP-TR`, `SYN:BT-SPEC`, `SYN:DOCSIS`.
+Synthetic instance-of classes for SDO docs without wikidata Q-ID counterparts:
+`SYN:3GPP-TS`, `SYN:3GPP-TR`, `SYN:BT-SPEC`, `SYN:DOCSIS`.
 
 ## Loading
 
 ```python
-import pyarrow.parquet as pq
+import pyarrow.parquet as pq, pyarrow.compute as pc
 
+# stream
 pf = pq.ParquetFile("telecom_kb_v15.parquet")
 for batch in pf.iter_batches(batch_size=50_000):
     for row in batch.to_pylist():
-        # row["statement_id"], row["source"], row["subject_id"], row["property_id"], ...
         pass
-```
 
-Filter by source / subject:
-```python
-import pyarrow.compute as pc
+# filter examples
 t = pq.read_table("telecom_kb_v15.parquet")
-ietf = t.filter(pc.equal(t["source"], "IETF"))
 verizon = t.filter(pc.equal(t["subject_id"], "Q467752"))
+ietf    = t.filter(pc.equal(t["source"],     "IETF"))
 ```
 
-Reconstruct a per-entity view by grouping on `subject_id` + `statement_id`.
+Reconstruct a per-entity view by grouping on `subject_id` (+ `statement_id`).
 
 ## Caveats
 
-- Wikidata side reflects state of the pleiasdata 2026-Q1 wikidata dump; items
-  added more recently are absent.
-- Standards side is **metadata only** (titles / dates / versions / URLs / authors /
-  obsoletes-chains), not full text.
-- Wikidata coverage of individual standards documents is sparse: 0 3GPP TS docs
-  in wikidata, ~95 RFCs by exact `RFC NNN` label (plus ~1,700 by content-title
-  via Q212971 RFC class), ~572 ITU-T recommendations by exact label. The
+- Wikidata side reflects a 2026-Q1 dump; later additions are absent.
+- Standards side is **metadata only** (titles / dates / versions / URLs /
+  authors / obsoletes-chains), not full spec text.
+- Wikidata coverage of individual standards documents is sparse: 0 3GPP TS
+  docs by exact label, ~95 RFCs by exact `RFC NNN` label (plus ~1,700 by
+  content-title via Q212971 RFC class), ~572 ITU-T recommendations. The
   standards-side rows are largely net-new vs wikidata.
-- Some cascade noise remains (e.g. non-telecom patents owned by Samsung /
-  Qualcomm; documented in earlier audits but kept per user scope).
+- Some cascade noise remains (non-telecom patents owned by Samsung / Qualcomm
+  etc.) — documented in audits but kept per scope.