## Products built on URPX

[Cloud-hosted rate plan visualization for utility customer portals. Renders URPX data as interactive displays customers can understand.](/content/products/utilipub/index.html)

### UtiliPub™

Data infrastructure for the energy transition.

## What it is

An OWL ontology with 211 classes and 268 properties that captures the full complexity of modern rate structures — time-of-use schedules, demand charges, DER provisions, tiered pricing, seasonal overlays — in a format any software system can consume.

## Why it matters

The US has a standard for energy usage data (Green Button) but no equivalent for the pricing of that energy. URPX fills that gap with institutional backing from LF Energy.

## Status

LF Energy Standards and Specifications. Version 0.2.0 pre-draft. Vendor-neutral, open-source.

# URPX — Utility Rate Plan Exchange

An open data standard that makes rate plans machine-readable.

[URPX on LF Energy](https://lfenergy.org/projects/utility-rate-plan-exchange-urpx/)

## Governance and participation

URPX is developed under the Linux Foundation Energy umbrella as part of LF Energy Standards and Specifications. The standard is open source, vendor-neutral, and developed through an open process. Flux Tailor maintains the specification and reference implementations while working toward broader community governance.

## Standards ecosystem

### Green Button

Energy usage data standard. Adopted by hundreds of US utilities. Answers "how much energy did you use?"

### URPX

Rate plan data standard. 211 OWL classes, 268 properties. Answers "how much does that energy cost, and under what rules?"

### Carbon Data Specification

LF Energy project for carbon intensity data. URPX is designed to complement CDS in carbon-aware rate analysis.