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It often includes <a href="/docs/managed-datahub/observe/assertions">assertions</a> about the data’s schema, freshness, and data quality.</p><p>Some of the key characteristics of a Data Contract are:</p><ul><li><strong>Verifiable</strong> : based on the actual physical data asset, not its metadata (e.g., schema checks, column-level data checks, and operational SLA-s but not documentation, ownership, and tags).</li><li><strong>A set of assertions</strong> : The actual checks against the physical asset to determine a contract’s status (schema, freshness, volume, custom, and column)</li><li><strong>Producer oriented</strong> : One contract per physical data asset, owned by the producer.</li></ul><details class="details_lb9f alert alert--info details_b_Ee" data-collapsed="true"><summary>Consumer Oriented Data contracts</summary><div><div class="collapsibleContent_i85q">We’ve gone with producer-oriented contracts to keep the number of contracts manageable and because we expect consumers to desire a lot of overlap in a given physical asset’s contract. Although, we've heard feedback that consumer-oriented data contracts meet certain needs that producer-oriented contracts do not. For example, having one contract per consumer all on the same physical data asset would allow each consumer to get alerts only when the assertions they care about are violated.We welcome feedback on this in slack!</div></div></details><p>Below is a screenshot of the Data Contracts UI in DataHub.</p><p align="center"><img loading="lazy" width="70%" src="https://raw.githubusercontent.com/datahub-project/static-assets/main/imgs/observe/data_contracts/validated-data-contracts-ui.png" class="img_ev3q"></p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="data-contract-and-assertions">Data Contract and Assertions<a href="#data-contract-and-assertions" class="hash-link" aria-label="Direct link to Data Contract and Assertions" title="Direct link to Data Contract and Assertions"></a></h2><p>Another way to word our vision of data contracts is <strong>A bundle of verifiable assertions on physical data assets representing a public producer commitment.</strong>
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These can be all the assertions on an asset or only the subset you want publicly promised to consumers. Data Contracts allow you to <strong>promote a selected group of your assertions</strong> as a public promise: if this subset of assertions is not met, the Data Contract is failing.</p><p>See docs on <a href="/docs/managed-datahub/observe/assertions">assertions</a> for more details on the types of assertions and how to create and run them.</p><div class="theme-admonition theme-admonition-note alert alert--secondary admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewBox="0 0 14 16"><path fill-rule="evenodd" d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z"></path></svg></span>Ownership</div><div class="admonitionContent_S0QG"><p>The owner of the physical data asset is also the owner of the contract and can accept proposed changes and make changes themselves to the contract.</p></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="how-to-create-data-contracts">How to Create Data Contracts<a href="#how-to-create-data-contracts" class="hash-link" aria-label="Direct link to How to Create Data Contracts" title="Direct link to How to Create Data Contracts"></a></h2><p>Data Contracts can be created via DataHub CLI (YAML), API, or UI.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="datahub-cli-using-yaml">DataHub CLI using YAML<a href="#datahub-cli-using-yaml" class="hash-link" aria-label="Direct link to DataHub CLI using YAML" title="Direct link to DataHub CLI using YAML"></a></h3><p>For creation via CLI, it’s a simple CLI upsert command that you can integrate into your CI/CD system to publish your Data Contracts and any change to them.</p><ol><li>Define your data contract.</li></ol><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># Inlined from /metadata-ingestion/examples/library/create_data_contract.yml</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># id: sample_data_contract # Optional: if not provided, an id will be generated</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token key atrule">entity</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> urn</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">li</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">dataset</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">(urn</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">li</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">dataPlatform</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">hive</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain">SampleHiveDataset</span><span cla
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