Bump to v0.3.0: add ext-rdf, LOAD FROM, visualizer examples

- Bump all workspace crates from 0.2.0 → 0.3.0
- Add ext-rdf to publish.sh (Tier 5)
- Update CHANGELOG with [0.3.0] release notes

Author: darmie

CHANGELOG.md

@@ -4,6 +4,42 @@ All notable changes to KyuGraph are documented in this file.
 
 ## [Unreleased]
 
+## [0.3.0] — 2026-02-26
+
+### Added
+
+- **ext-rdf** — New extension crate for RDF Linked Data import following
+  Linked Data Principles. Supported formats: Turtle (`.ttl`), N-Triples
+  (`.nt`), N-Quads (`.nq`), RDF/XML (`.rdf`/`.owl`). Schema is inferred
+  automatically from triples:
+  - `rdf:type` → node table (local name as table name)
+  - Literal-valued predicates → node properties (XSD datatype → LogicalType)
+  - URI-valued predicates → relationship tables (hyperlinks as edges)
+  - Subject URI stored as `STRING` primary key on every node table
+  - Untyped subjects assigned to a `Resource` default table
+  - Extension procedures: `CALL rdf.stats(path)`, `CALL rdf.prefixes(path)`,
+    `CALL rdf.types(path)`
+
+- **kyu-parser: `LOAD FROM` statement** — New statement that imports an RDF
+  file and auto-creates all tables. Distinct from `COPY FROM` (which requires
+  a pre-existing table): `LOAD FROM 'file.ttl'` creates the full schema from
+  scratch.
+
+- **kyu-binder** — Added `BoundLoadFrom` and `bind_load_from()` to resolve the
+  new `LOAD FROM` AST node.
+
+- **kyu-api: `Connection::exec_load_from()`** — Orchestrates the full RDF
+  import pipeline: parse → infer schema → create node/rel tables → insert rows.
+
+- **kyu-visualizer: library target** — Added `src/lib.rs` exposing
+  `pub fn launch(db: Database)` so examples can each pre-seed the database
+  independently before opening the visualizer window. The default binary now
+  starts with an empty database.
+
+- **kyu-visualizer: `examples/rdf_kg`** — New visualizer example that imports
+  the FOAF + schema.org research knowledge graph via `LOAD FROM` and opens the
+  interactive explorer pre-loaded with researchers, institutions, and papers.
+
 ### Fixed
 
 - **kyu-api: Multi-MATCH relationship creation** — `exec_match_dml` now supports

Cargo.lock

@@ -33,29 +33,29 @@ exclude = [
 
 [workspace.dependencies]
 # Internal crates
-kyu-common     = { version = "0.2.0", path = "crates/kyu-common" }
-kyu-types      = { version = "0.2.0", path = "crates/kyu-types" }
-kyu-catalog    = { version = "0.2.0", path = "crates/kyu-catalog" }
-kyu-storage    = { version = "0.2.0", path = "crates/kyu-storage" }
-kyu-transaction = { version = "0.2.0", path = "crates/kyu-transaction" }
-kyu-delta      = { version = "0.2.0", path = "crates/kyu-delta" }
-kyu-index      = { version = "0.2.0", path = "crates/kyu-index" }
-kyu-parser     = { version = "0.2.0", path = "crates/kyu-parser" }
-kyu-binder     = { version = "0.2.0", path = "crates/kyu-binder" }
-kyu-planner    = { version = "0.2.0", path = "crates/kyu-planner" }
-kyu-executor   = { version = "0.2.0", path = "crates/kyu-executor" }
-kyu-expression = { version = "0.2.0", path = "crates/kyu-expression" }
-kyu-copy       = { version = "0.2.0", path = "crates/kyu-copy" }
-kyu-extension  = { version = "0.2.0", path = "crates/kyu-extension" }
-kyu-api        = { version = "0.2.0", path = "crates/kyu-api" }
-kyu-graph      = { version = "0.2.0", path = "crates/kyu-graph" }
-kyu-coord      = { version = "0.2.0", path = "crates/kyu-coord" }
+kyu-common     = { version = "0.3.0", path = "crates/kyu-common" }
+kyu-types      = { version = "0.3.0", path = "crates/kyu-types" }
+kyu-catalog    = { version = "0.3.0", path = "crates/kyu-catalog" }
+kyu-storage    = { version = "0.3.0", path = "crates/kyu-storage" }
+kyu-transaction = { version = "0.3.0", path = "crates/kyu-transaction" }
+kyu-delta      = { version = "0.3.0", path = "crates/kyu-delta" }
+kyu-index      = { version = "0.3.0", path = "crates/kyu-index" }
+kyu-parser     = { version = "0.3.0", path = "crates/kyu-parser" }
+kyu-binder     = { version = "0.3.0", path = "crates/kyu-binder" }
+kyu-planner    = { version = "0.3.0", path = "crates/kyu-planner" }
+kyu-executor   = { version = "0.3.0", path = "crates/kyu-executor" }
+kyu-expression = { version = "0.3.0", path = "crates/kyu-expression" }
+kyu-copy       = { version = "0.3.0", path = "crates/kyu-copy" }
+kyu-extension  = { version = "0.3.0", path = "crates/kyu-extension" }
+kyu-api        = { version = "0.3.0", path = "crates/kyu-api" }
+kyu-graph      = { version = "0.3.0", path = "crates/kyu-graph" }
+kyu-coord      = { version = "0.3.0", path = "crates/kyu-coord" }
 
 # Extensions
-ext-algo       = { version = "0.2.0", path = "extensions/ext-algo" }
-ext-fts        = { version = "0.2.0", path = "extensions/ext-fts" }
-ext-vector     = { version = "0.2.0", path = "extensions/ext-vector" }
-ext-rdf        = { version = "0.2.0", path = "extensions/ext-rdf" }
+ext-algo       = { version = "0.3.0", path = "extensions/ext-algo" }
+ext-fts        = { version = "0.3.0", path = "extensions/ext-fts" }
+ext-vector     = { version = "0.3.0", path = "extensions/ext-vector" }
+ext-rdf        = { version = "0.3.0", path = "extensions/ext-rdf" }
 
 # Allocator
 tikv-jemallocator = "0.6"

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "kyu-api"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2024"
 description = "Database and Connection API for KyuGraph with Arrow Flight support"
 license = "MIT"

crates/kyu-api/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "kyu-binder"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2024"
 description = "Semantic analysis and name resolution for KyuGraph Cypher queries"
 license = "MIT"

crates/kyu-binder/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "kyu-catalog"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2024"
 description = "Schema catalog for KyuGraph: node/rel table entries and DDL management"
 license = "MIT"

crates/kyu-catalog/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "kyu-graph-cli"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2024"
 description = "Interactive Cypher shell for the KyuGraph database"
 license = "MIT"

crates/kyu-cli/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "kyu-common"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2024"
 description = "Shared error types, IDs, and configuration for the KyuGraph database"
 license = "MIT"

crates/kyu-common/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "kyu-coord"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2024"
 description = "Multi-tenant coordination layer for KyuGraph: task queues, worker pools, tenant registry"
 license = "MIT"

crates/kyu-coord/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "kyu-copy"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2024"
 description = "Bulk data import for KyuGraph: CSV, Parquet, Arrow IPC, and Kafka readers"
 license = "MIT"