sdmxlib
Note: This library has been written extensively with AI assistance (Claude Code). Users who are not comfortable with AI-generated code should take that into account before adopting it.
SDMX structural metadata library for Python. Fetch and navigate Data Structure Definitions, Codelists, Dataflows, and related artefacts from any SDMX REST endpoint — with plain attribute access, no XML or URN chasing required.
Quick start
import sdmxlib as sl
with sl.RestRegistry(sl.Provider.BIS) as reg:
urn = sl.DataStructure.urn_for(agency="BIS", id="WS_CBPOL")
dsd = reg.get(urn, resolve=True)
for dim in dsd.dimensions:
if dim.is_enumerated:
cl = dim.representation()
print(f"{dim.id}: {cl.id} ({len(cl.codes)} codes)")
FREQ: CL_FREQ (7 codes)
REF_AREA: CL_BIS_IF_REF_AREA (44 codes)
INSTR_ASSET: CL_INSTR_ASSET (12 codes)
BORROWER_CTY: CL_BIS_IF_REF_AREA (44 codes)
Installation
uv add sdmxlib
# or: pip install sdmxlib
What it does
- Connects to any SDMX 2.1 or 3.0 REST endpoint; built-in shortcuts for ECB,
BIS, ESTAT, IMF, OECD, and the SDMX Global Registry via
sl.Provider - One read, with resolution depth as a parameter:
get(urn)for a skeleton,get(urn, resolve=True)for the full reference graph,resolve=[sl.Codelist]for named types only, andpartial=Falsefor untrimmed schemes - Returns fully resolved domain objects with plain attribute access — no XML, no URN chasing
- Filter collections with lambdas or the
item()expression API - Build SDMX artefacts locally and serialise to SDMX-ML or SDMX-JSON
LocalRegistry— a DuckDB-backed persistent store for offline access, and a position in aRestRegistry's source chain viastore=- A path query language over both planes:
reg.query(sl.q.dataflow)for structures,reg.observations(flow)for rows with lazy codelist + hierarchy loading, automatic Ref resolution, and direct SQL code maps; supports shared connections and any-language queries - Uniform SKOS-aligned tree API (
roots/leaves/narrower/broader/*_transitive/depth_ofplus bulk projectionsdepths/broader_map/ancestors_map/inherit_along_broader) onCodelist,Hierarchy,CategoryScheme,MetadataStructure— and their lazy SQL variantsLazyCodelist/LazyHierarchy - Reference metadata via
MetadataStructure(MSD),Metadataflow, andMetadataSet— attach typed footnotes, methodology notes, or quality reports to any identifiable artefact. Definitions ride inStructureMessage; populated payloads ride inMetadataMessage(<mes:GenericMetadata>in SDMX-ML 3.0; metadata-schema envelope in SDMX-JSON 2.0). Both message kinds round-trip throughRegistry, JSON, and XML. - Integrates with Polars for schema generation and data validation
- Fully typed — IDE completion and static analysis work throughout
For AI assistants
Two condensed reference files at the repo root are written for LLM tools (Claude Code, Cursor, Copilot, etc.):
llms.txt— full library overview: install, registries, data fetching, reference metadata, and the domain-type cheat sheetllms-dsl.txt— focused query-DSL reference:sl.item/sl.q/sl.dimpredicates, theQuery/Frame/DataQuerychains, and the uniform SKOS tree API
Point your assistant at these to keep generated code aligned with the library's actual surface.
Upgrading
sdmxlib is pre-stability and breaks cleanly rather than carrying two spellings
of the same idea. If you are coming from 0.48, read
Upgrading — sl.Registry
is now sl.LocalRegistry, get() takes a URN and a resolution depth, and the
four query DSLs are one path language.
Documentation
See the docs for the full cookbook, including:
- Connecting to registries and choosing a resolution depth
- Persisting artefacts in a local DuckDB store with
LocalRegistry - Querying structures and observations with the
sl.qpath language - Fetching observation data and pivoting to wide format
- Inspecting DSDs and building code maps for ETL pipelines
- Generating Polars schemas from SDMX Data Structure Definitions
- Browsing data catalogs and filtering dataflows
- Working with constraints, hierarchies, and serialisation
Development
just check # lint + typecheck
just test # unit tests
just test-integration # live endpoint tests (requires network)
just ci # full pre-commit gate
1 maintainer
Metadata
1 maintainer
Release files for sdmxlib 0.68.0
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Total release size: 1.8 MB
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