**Please note the change of venue!** Welcome to our November 2026 meetup hosted by [Enablis](https://enablis.co/). Please see the directions provided on this page. We are pleased to welcome Will Martin with "*From Open Storage to Open Meaning: How Apache Ossie (Incubating) Completes the Open Data Lakehouse*" If you would like to volunteer as a speaker for our upcoming meetups, please reach out to us at lds@jumpingrivers.com. **Schedule** **18:00--18:45h**: Refreshments (Food served on first come first served basis) **18:45--18:50h**: Welcome **18:50--20:00h**: Will Martin, *Data & AI Evangelist* at Dremio, *From Open Storage to Open Meaning: How Apache Ossie (Incubating) Completes the Open Data Lakehouse* The open data lakehouse has a solid data foundation thanks to Apache Iceberg and Apache Polaris: an open table format and catalog that any query engine can share without lock-in. But openness in storage doesn't mean openness in meaning. Business context, like “revenue” and “active customer”, tends to sit in downstream systems, like notebooks and BI tools. These definitions tend not to agree, and they don’t travel well between systems. That is, until Apache Ossie (Incubating) — the newly Apache-incubated open spec for semantic layers and ontologies, backed by Snowflake, Dremio, Databricks, dbt Labs, and Salesforce. This talk will explain the current open data lakehouse stack and introduce Apache Ossie (Incubating). We’ll discuss how open source projects provide vendor-neutral options without sacrificing performance, and why shared semantics is the next open standards fight in this age of agentic analytics. **Bio** Will Martin is Dremio’s Data & AI Evangelist. Starting out with statistical analysis in particle physics, his professional journey has spanned multiple industries, including banking, shipping logistics, entertainment, healthcare, defence, and customer 360. With experience as a data engineer, solutions architect, and software developer, he has spent 15+ yea

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