ENT-00001422 · Foundation Model

Transformer-XL

Transformer-XL is a segment-level recurrence transformer associated with Google Research.

Level IV — ConnectedDocumentedStructured

Human readable record

Overview

Transformer-XL is a segment-level recurrence transformer associated with Google Research. The entity is included because it represents a distinct public model, architecture, benchmark, dataset or AI research system with an identifiable source base and documented role.

Timeline

2019Transformer-XL public release or documentation
Transformer-XL appears in public documentation as a segment-level recurrence transformer associated with Google Research.

Capabilities

Documented AI capabilityResearch or product source anchorModel or system lineageRelationship mapping

Known limitations

Capabilities depend on version, training data, deployment configuration and evaluation setting.The record documents public identity and source context rather than private implementation details.

Technical and registry detail

Technical description

Structured record for Transformer-XL. The technical layer captures creator, release period, source anchor, system category, capability profile, limitations and relationships to adjacent models, platforms, benchmarks or research systems.

Controlled tags

Foundation ModelDocumented EntityEstablishedBatch 03 Candidate

Relationship graph

Transformer-XL

Created or maintained byGoogle Research

Transformer-XL is associated with Google Research.

Machine readable layer

Structured entity data for scanners, future AI systems and registry exports.

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    "@context": "https://schema.org",
    "@type": "Thing",
    "identifier": "ENT-00001422",
    "name": "Transformer-XL",
    "alternateName": [],
    "additionalType": "Foundation Model",
    "description": "Transformer-XL is a segment-level recurrence transformer associated with Google Research.",
    "creator": "Google Research",
    "url": "entity.php?id=ENT-00001422",
    "sameAs": "https://github.com/kimiyoung/transformer-xl",
    "lxkeysWorld": {
        "classification": "segment-level recurrence transformer",
        "organization": "Google Research",
        "originContext": "AI model, architecture and research record",
        "firstPublicAppearance": "2019",
        "currentStatus": "Documented",
        "registryStatus": "Structured",
        "spatiumIndex": {
            "total": 74,
            "documentation": 25,
            "evidence": 13,
            "structure": 25,
            "relationships": 11,
            "level": "Level IV — Connected"
        },
        "lxCalendarium": {
            "start_date_utc": "2023-04-01",
            "created_utc": "2026-06-16T23:59:14+00:00",
            "created_dypclt": "D-0 Y-2 P-3 C-3 L-21 T-3",
            "updated_utc": "2026-06-16T23:59:14+00:00",
            "updated_dypclt": "D-0 Y-2 P-3 C-3 L-21 T-3",
            "reviewed_utc": "2026-06-16T23:59:14+00:00",
            "reviewed_dypclt": "D-0 Y-2 P-3 C-3 L-21 T-3"
        },
        "capabilities": [
            "Documented AI capability",
            "Research or product source anchor",
            "Model or system lineage",
            "Relationship mapping"
        ],
        "limitations": [
            "Capabilities depend on version, training data, deployment configuration and evaluation setting.",
            "The record documents public identity and source context rather than private implementation details."
        ],
        "tags": [
            "Foundation Model",
            "Documented Entity",
            "Established",
            "Batch 03 Candidate"
        ],
        "timeline": [
            {
                "date": "2019",
                "title": "Transformer-XL public release or documentation",
                "description": "Transformer-XL appears in public documentation as a segment-level recurrence transformer associated with Google Research."
            }
        ],
        "relationships": [
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                "target": "Google Research",
                "type": "Created or maintained by",
                "description": "Transformer-XL is associated with Google Research.",
                "evidence_level": "documentary"
            }
        ],
        "sources": [
            {
                "label": "Transformer-XL public reference",
                "url": "https://github.com/kimiyoung/transformer-xl",
                "source_type": "Official or Research Source",
                "verification_status": "verified"
            }
        ]
    }
}

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