An open, SHACL-validated, provenance-first reference graph of the UK hydrogen and electric aviation ecosystem. Independent open dataset by The Tesseract Academy (CC BY 4.0). This page is built to WCAG 2.2 AA.
The value-chain axis of the model: each stage transforms a hydrogen carrier and is realised by one or more technologies. Rendered from the ontology's chain-stage definitions.
flowchart LR
E["Renewable electricity"] --> P["1 Production (electrolysis)"]
P -->|GH2| L["2 Liquefaction & distribution"]
L -->|LH2| S["3 On-airport cryogenic storage"]
S -->|LH2| R["4 Aircraft refuelling"]
R -->|LH2| PR["5 Propulsion (fuel cell / turbine)"]
classDef s fill:#0b8a8a,stroke:#fff,color:#fff;
class P,L,S,R,PR s;
Hydrogen chain, five stages left to right: renewable electricity feeds production by electrolysis, producing gaseous hydrogen; liquefaction and distribution produce liquid hydrogen; then on-airport cryogenic storage; aircraft refuelling; and finally propulsion by fuel cell or turbine. Each arrow is labelled with the hydrogen carrier form.
The provenance-first data model
Maturity and every quantity are reified as their own nodes carrying a value and a source, after the PECO pattern, so no number is ever an unsourced literal.
Class diagram: a Technology realises a ChainStage and has TRL assessments and quantities; each assessment and quantity is derived from a Source with a title and URL. TRL assessments carry an integer 1 to 9 and a date; quantities carry a value, a unit and a year.
Explore the ecosystem
Switch between an interactive network view and an equivalent data table. Both present the same 45 entities and their relationships.
Type to find and focus an entity. The network view can also be panned with the mouse or, when focused, the arrow keys; the table view is a full keyboard-accessible alternative.
All 45 entities with type, maturity or TRL, and connections. Sortable-free, screen-reader friendly.