storywrangler 0.0.4

Dataset registration client, entity validation, and project scaffolding for Storywrangler

Storywrangler SDK

Dataset registration client, entity validation, and project scaffolding for Storywrangler.

Implements the Storywrangler Specification v0.0.3.

Installation

pip install storywrangler

Quick Start

1. Scaffold a new dataset project

# Flat parquet
uvx storywrangler new my-dataset --format parquet

# Hive-partitioned parquet
uvx storywrangler new my-dataset --format parquet_hive

# With snakemake instead of make
uvx storywrangler new my-dataset --format parquet_hive --orchestrator snakemake

This generates the project structure:

my-dataset/
  config/entities.yaml      # entity mappings (local_id → canonical ID)
  extract/src/scrape.py     # download raw data
  transform/src/process.py  # process into parquet
  adapter/submit.py         # register with the platform
  tests/                    # entity coverage tests
  Makefile                  # or Snakefile

2. Configure and register

cd my-dataset
cp .env.example .env        # fill in DATASET_ID, DOMAIN, DATA_PATH, API_KEY
uv sync
# Edit adapter/submit.py, config/entities.yaml
make submit

3. Or register programmatically

from storywrangler import Storywrangler

client = Storywrangler()  # reads API_KEY from env

client.registry.register({
    "catalog": "vcsi",
    "domain": "babynames",
    "dataset_id": "names",
    "data_location": "/data/babynames",
    "data_format": "parquet_hive",
    "description": "US baby name frequencies by state, sex, and year.",
    "endpoint_schema": {"type": "types-counts"},
    "transform": {"time_dimension": "year"},
    "entity_mapping": {"local_id_column": "state", "entity_namespace": "wikidata"},
    "entities": [
        {"local_id": "VT", "entity_id": "wikidata:Q16551", "entity_name": "Vermont"},
        # ...
    ],
    "ownership": {"owner_group": "vcsi", "contact": "[e-mail]"},
    "lineage": {"repo": "https://github.com/org/babynames"},
})

Registration Schema

The registration payload (DatasetCreate) is defined in Specification §3.7.

Required fields

Field	Description
catalog	Producer identity (organisation or group)
domain	Owning service or router (e.g. wikimedia, babynames)
dataset_id	Short identifier, unique within domain
data_location	Path to data on disk (string or list of strings)
data_format	parquet or parquet_hive
description	Human-readable description
ownership	{owner_group, contact}
lineage	{repo} at minimum

Storage formats

• parquet — single file, flat directory, or explicit file list. All filtering via WHERE clauses.
• parquet_hive — directory tree with col=val/ at every level. Partition levels are auto-discovered at registration time — you only declare time_dimension and optionally hash_bucket.

Key optional fields

Field	Purpose
endpoint_schema	Output shape: types-counts (rank distributions) or time-series (tabular GROUP BY)
transform	Query axes: time_dimension, filter_dimensions (non-hive columns), hash_bucket
entity_mapping	Maps a local column to canonical entity IDs (see below)
entities	Entity rows: {local_id, entity_id, entity_name}
manifest	Coverage metadata (auto-derived — don't compute manually)
version	"latest" (default, mutable) or semver like "1.0.0" (immutable)

Auto-derived at registration

The server computes these from the data — submitters should not set them:

• data_schema — column names and types
• level_order — hive nesting order with type tags and defaults
• manifest.availability — time/entity coverage ranges
• filter_values — distinct values per filter dimension
• hash_bucket config — bucket counts per entity

Entity Mapping

entity_namespace — declaring identifier type

entity_mapping.entity_namespace tells the platform what kind of entity the local-ID column holds. This enables cross-dataset joins and automatic entity resolution.

Pattern 1 — opaque local keys (entity rows required):

# Column holds state abbreviations — a lookup table maps them to Wikidata
{
    "entity_mapping": {"local_id_column": "state", "entity_namespace": "wikidata"},
    "entities": [
        {"local_id": "VT", "entity_id": "wikidata:Q16551", "entity_name": "Vermont"},
    ],
}

Pattern 2 — global-identifier column (no entity rows needed):

# Column already holds OpenAlex author URLs
{
    "entity_mapping": {"local_id_column": "ego_author_id", "entity_namespace": "openalex"},
    # no "entities" list required — the platform derives canonical IDs from the namespace
}

Instruments

The SDK wraps the platform's analytical endpoints so you can call them from Python without building HTTP requests.

Allotaxonometer

Compare two type-frequency systems using rank-turbulence divergence:

result = client.instrument.allotax(
    domain="wikimedia", dataset="ngrams",
    entity="wikidata:Q30", entity2="wikidata:Q145",
    dates="2024-10-01,2024-10-31",
    alpha=1.0,
)
# result keys: normalization, delta_sum, diamond_counts, wordshift, balance, meta

Filter dimensions are passed as keyword arguments:

result = client.instrument.allotax(
    domain="babynames", dataset="ngrams",
    dates="1925", dates2="2025",
    sex="M", sex2="F",
)

RTD (lightweight)

Fast date-vs-date wordshift (no diamond plot):

result = client.instrument.rtd(
    entity="wikidata:Q30",
    dates="2026-02-17", dates2="2026-02-10",
)
# result keys: wordshift, alpha, meta

For the underlying computation without the platform, use the allotax package directly.

Hash Bucket Assignment

For datasets with content-sharded partitions (transform.hash_bucket), use assign_bucket() to partition files consistently with the query layer:

from storywrangler.hashing import assign_bucket

# In your transform step — assign each row to a bucket directory
bucket = assign_bucket(term="hello world", num_buckets=16)
# → writes to ngram_bucket={bucket}/data.parquet

This uses murmur3_32 (seed 0) with a sign-bit mask, matching DuckDB's built-in murmur3_32() default. Both the backend query router and pipeline code import from the same source — storywrangler_schemas.hashing — ensuring bucket assignments are always consistent.

Entity Validation

from storywrangler.validation import EntityValidator

validator = EntityValidator()

validator.validate_wikidata("wikidata:Q937")          # True
validator.validate_orcid("orcid:0000-0002-1825-0097")  # True
validator.validate_openalex("openalex:A5002034958")     # True
validator.validate("ror:05qghxh33")                     # True (any namespace)

Supported Namespaces

Namespace	Format example	Entity types
wikidata	wikidata:Q937	People, places, concepts, …
orcid	orcid:0000-0002-1825-0097	Researchers
openalex	openalex:A5002034958	Authors (A), Works (W), Institutions (I), Concepts (C), Sources (S), Funders (F), Publishers (P)
ror	ror:05qghxh33	Research organisations
ipeds	ipeds:231174	US higher-ed institutions
doi	doi:10.1038/nature12373	Published works
isbn	isbn:978-3-16-148410-0	Books
local	local:<any-string>	Dataset-local identifiers

Entity Graph (Beta)

The backend maintains an entity graph — a directed adjacency list of edges between canonical entity IDs. This enables multi-hop traversal across namespaces.

openalex:A5002034958
  --affiliated_with--> openalex:I26873012   (UVM)
  --same_as----------> wikidata:Q1068        (UVM on Wikidata)
  --country----------> wikidata:Q30          (United States)

Supported predicates: affiliated_with, same_as, country, broader

API endpoints:

GET  /registry/entity-graph/path?from_id=openalex:A5002034958&to_namespace=wikidata
GET  /registry/entity-graph/neighbors?entity_id=openalex:I26873012
POST /admin/registry/entity-graph          # upsert edges (admin)

Standards Compliance

This SDK implements Storywrangler Specification v0.0.3.

All validators follow the format requirements and validation algorithms defined in the specification.