> For the complete documentation index, see [llms.txt](https://gitbook-docs.coinmetrics.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook-docs.coinmetrics.io/reference-data/methodologies.md). # Methodologies This section holds the published methodology documents that govern the reference data Coin Metrics serves. The product pages describe how each dataset behaves in practice, while the documents here are the authoritative statement of the rules behind it. ## datonomy Methodology The rules that govern datonomy, the digital asset classification system developed by Coin Metrics, Goldman Sachs, and MSCI, and administered by MSCI. It sets out the philosophy behind the classification, the eligibility thresholds an asset must meet to be classified and to stay classified, the screening applied to the exchanges those thresholds are measured against, the review process for new assets and reclassifications, and the definition of every class, sector, and subsector in the hierarchy. This is the document to reach for when the question is why an asset sits where it does, or what a given category actually means. The [datonomy Overview](/reference-data/datonomy-overview.md) summarizes the structure and the eligibility rules, but the category definitions themselves live here. {% content-ref url="/pages/x2l4WDJU0KqDzBBGKTwv" %} [datonomy Methodology](/reference-data/methodologies/datonomy-methodology.md) {% endcontent-ref %} ## Related * [datonomy Overview](/reference-data/datonomy-overview.md): the classification structure, the full subsector hierarchy, and how the pieces fit together. * [Asset Taxonomy](/reference-data/datonomy-overview/asset-taxonomy.md): the classification of each covered asset, served by the API. * [Asset Taxonomy Metadata](/reference-data/datonomy-overview/asset-taxonomy-metadata.md): the class, sector, and subsector structure for a given taxonomy version. * [Talos Exchange Scorecard](/market-data/methodologies/talos-exchange-scorecard.md): the exchange evaluation behind the venue screening that datonomy eligibility is measured against. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://gitbook-docs.coinmetrics.io/reference-data/methodologies.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.