zirenx/digital-twin-composition

Digital Twin Composition

Datasets for retrieving and filling DTDL digital-twin interfaces from natural-language requests. All parts live in this one repo as separate configs.

Two families

The configs come in two provenances that share the same schemas but must not be mixed:

• synthetic (triplets, interfaces, fill_eval, topics, eval_small, eval_mid) — LLM-generated interfaces and everything derived from them. This is the training pool.
• real (interfaces_real, triplets_real, fill_eval_real) — the same three schemas built from real vendor device interfaces. This is the evaluation pool.

The two catalogues share no interface ids. The retrieval model is trained on triplets and scored on triplets_real, so concatenating a *_real config with its synthetic namesake would leak the evaluation set into training.

Configs

config	family	split	rows	description
triplets	synthetic	train	27,771	Retrieval triplets: natural-language query, correct interface, different-topic negative.
interfaces	synthetic	train	27,770	The DTDL interface catalogue every other synthetic config refers to.
fill_eval	synthetic	train	27,770	Property-filling evaluation: a spec paragraph and the filled interface it implies.
topics	synthetic	train	6,097	Digital-twin topics; id is the middle segment of every synthetic dtmi interface id.
eval_small	synthetic	test	100	Composed end-to-end system queries, grouped by topic.
eval_mid	synthetic	test	100	Composed queries paired with a topic reference or a full interface.
interfaces_real	real	train	640	Usable DTDL models filtered from Azure/iot-plugandplay-models; topic is the vendor.
triplets_real	real	test	640	Retrieval triplets over the plug-and-play interfaces; the held-out retrieval eval set.
fill_eval_real	real	test	640	Property-filling evaluation over the plug-and-play interfaces.

from datasets import load_dataset

triplets = load_dataset("zirenx/digital-twin-composition", "triplets", split="train")           # synthetic, train
interfaces = load_dataset("zirenx/digital-twin-composition", "interfaces", split="train")
eval_triplets = load_dataset("zirenx/digital-twin-composition", "triplets_real", split="test")  # real, evaluation

Nested fields are JSON strings

positive, negative, contents, answer and interface hold JSON text, because DTDL payloads are not uniformly typed — contents mixes objects with bare strings, a schema may be a string or an object, and every fill_eval answer has its own key set. Storing them as strings keeps the data lossless; parse a column to get the original value:

import json
interface = json.loads(triplets[0]["positive"])
print(interface["@id"])  # dtmi:<topic>:<Name>;1

How the parts join

Every interface id has the form dtmi:<topic>:<Name>;1, and the topic columns are precomputed from the id for convenience. Within the synthetic family <topic> is normally a topics.id; within the real family it is the vendor name (Advantech, ASUS, …), which is deliberately absent from topics — that config describes the synthetic pool only.

fill_eval.interface_id and the id in a parsed triplets.positive both resolve to interfaces.id. The same holds inside the real family against interfaces_real, never across families.

Within each family the three configs are aligned one-to-one: same row count, and the same multiset of interface ids. Every positive and negative resolves to a row in that family's interface catalogue.

Provenance

The synthetic interfaces and topics are LLM-generated by the scripts in the digital-twin-composition project; triplet negatives are sampled from a different topic and verified by an LLM judge plus a lexical near-duplicate filter.

The real configs come from Azure/iot-plugandplay-models, Microsoft's public device-model index. That catalogue was filtered down to the DTDL models that are actually usable here — they parse, and they declare properties worth retrieving and filling — and the same triplet and fill-eval generators were then run over the survivors. Interface ids keep their upstream dtmi:<vendor>:<Model>;1 form, which is why the topic column of the real family holds a vendor name.