Microsoft, Google back Apache Ossie to make enterprise data and AI platforms more interoperable

Microsoft and Google are joining a project to create an open specification for exchanging semantic models across data, analytics, and AI platforms. The project already has the backing of over 60 companies including Databricks, Informatica, Mistral AI, Nvidia, Oracle, Salesforce, and Snowflake.

Their support for Ossie makes it a little more likely that future analytics platforms will be interoperable, but is no guarantee that vendor lock-in will go away, analysts said.

The project began life as Open Semantic Interchange (OSI), then became Apache Ossie when it was accepted into the Apache Incubator in June. It uses JSON and YAML to represent semantic models, including datasets, fields, relationships, metrics and AI context, making them interoperable across platforms such as Snowflake, Databricks, Tableau, ThoughtSpot and Sigma.

Ossie uses a hub-and-spoke model for interoperability, serving as the common semantic format while converters translate between it and individual vendors’ semantic implementations. This means an enterprise could move a semantic model between compatible platforms without requiring a separate point-to-point converter for every pair of vendors.

Microsoft’s support for Ossie includes developing a two-way converter between Power BI semantic models and Ossie, allowing semantic context defined in Power BI to be represented in the common format and Ossie models to be converted back into Power BI, the company wrote in a blog post.

It is also pushing for the Ossie specification to include more support for its ontologies, and for Ossie’s recognized query languages to include DAX, the expression language used by Power BI for defining calculations and business metrics.

That means enterprises could carry the calculation logic that gives their semantic models business meaning alongside the underlying model when moving between platforms that support Ossie, it wrote.

Google, meanwhile, is in the process of joining Apache Ossie, a company representative said via email response. The company has not yet provided details on what it plans to contribute or has already contributed.

The Ossie specification lists BigQuery/GoogleSQL as a supported dialect, a result of “early community contributions that recognize BigQuery’s footprint across enterprise data stacks,”the representative said.

Microsoft, Google backing could reduce engineering work

Support for the project from the two technology giants could reduce the burden of repeated semantic engineering for enterprise teams moving analytics workloads between platforms, said Aditya Ranjan, senior data engineer at supermarket giant H-E-B.

That reduced engineering overhead could also help avoid metric drift, which is often the consequence of recreating and maintaining the same business definitions across platforms, according to Ashish Chaturvedi, executive research leader at HFS Research. With Ossie, developers can instead define a metric once and treat it as a versioned, reviewable code artifact, rather than rebuilding and maintaining it separately for each platform, he said.

Another potential benefit, said Ranjan, is that productivity could improve if developers spend less time translating and validating semantic definitions for each platform when onboarding new analytics tools or deploying new analytics or AI applications.

It can also make it easier for developers to build agentic applications with consistent business context, since maintaining one definition of a metric across platforms could reduce the risk of different agents interpreting the same metric differently, said Stephanie Walter, practice leader of AI stack at HyperFrame Research. That could give CIOs greater confidence to scale agentic deployments, she added.

Portability

For Michael Leone, principal analyst at Moor Strategy and Insights, the bigger advantage of Microsoft and Google supporting Ossie is that it gives enterprises more ownership of their semantic models by making them more portable.

That portability gives buyers more leverage, said Walter, since changing a BI or data platform would no longer require rebuilding the semantic layer from scratch.

However, portability does not necessarily mean complete interoperability, as the degree to which enterprises can move semantic models between platforms will depend on how much vendor-specific logic and functionality Ossie can represent and how accurately the destination platform can interpret it, Walter said.

“A portable structure does not guarantee equivalent behavior. A metric may survive conversion syntactically but still produce a different result because the destination interprets joins, nulls, time calculations, or filters differently.”

That challenge is particularly relevant for Power BI, as its time-intelligence functions, calculation groups, and context transitions in DAX do not always map cleanly to ANSI SQL, meaning a sophisticated Power BI model could lose some of its behavior in translation, Chaturvedi said.

CIOs, therefore, will still need to validate whether converted models preserve the intended calculations, business logic and results before putting them into production, especially for complex ones, Ranjan advised.

There are gaps around governance as well, Chaturvedi said: “The core specification covers datasets, relationships, fields, and metrics, but doesn’t mention row-level security, access policies, or certification status as first-class elements.”

That means enterprises have to set them up again on each platform.

Moreover, Ossie’s stability and long-term adoption remain open questions. The project is still “incubating”, meaning that it isn’t a full Apache Software Foundation project and has yet to prove it meets community norms. The current specification version, 0.2,is explicitly labeled a development draft, meaning the schema and capabilities could still change as it evolves, giving CIOs less certainty about its suitability as a long-term interoperability layer, Walter said.

“The current draft also removes the earlier document structure and does not yet define bundles or cross-model references, which are capabilities that large enterprises with interconnected models are likely to need,” said Chaturvedi.

Ossie could shift rather than eliminate vendor lock-in

Even if Ossie becomes widely adopted, it is unlikely to eliminate vendor lock-in entirely.

“New forms of lock-in are likely to emerge. Execution engines will retain proprietary behavior that no interchange format captures and vendor extensions will carry increasingly valuable features,” Chaturvedi said.

For enterprises, that means the definitions become portable while the behavior around them stays platform-specific, he added.