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page</button></div><div class="theme-doc-markdown markdown"><header><h1>Standardization</h1></header>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="what-is-the-standardization-framework">What Is The Standardization Framework?<a href="#what-is-the-standardization-framework" class="hash-link" aria-label="Direct link to What Is The Standardization Framework?" title="Direct link to What Is The Standardization Framework?">​</a></h2>
<p>The Standardization Framework is a set of tools and guidelines that enable the user to query and obtain data in a consistent way across multiple providers.</p>
<p>Each provider data model should inherit from an already defined <a href="https://docs.openbb.co/platform/data_models" target="_blank" rel="noopener noreferrer">standard</a> model. All standard models are created and maintained by the OpenBB team.</p>
<p>If a standard model needs to be created, please open a pull request and detail its use.</p>
<p>Standardizing provider query parameters and response data enhances the user experience by overcoming things like:</p>
<ul>
<li>Consistent query parameters across all data sources for a function, or type of function.</li>
<li>Output data that has conformed types, is validated, and will be JSON serializable.<!-- -->
<ul>
<li><code>NaN</code>, <code>NaT</code>, <code>&quot;None&quot;</code>, empty strings, are always returned as <code>NoneType</code> (null).</li>
</ul>
</li>
<li>Transparently defined schemas for the data and query parameters.</li>
<li>Outputs from multiple sources are comparable with each other and easily interchanged.</li>
</ul>
<p>The standard models are all defined in the <code>/OpenBBTerminal/openbb_platform/core/openbb_core/provider/standard_models/</code> <a href="https://github.com/OpenBB-finance/OpenBBTerminal/tree/main/openbb_platform/core/openbb_core/provider/standard_models" target="_blank" rel="noopener noreferrer">directory</a>.</p>
<h3 class="anchor anchorWithStickyNavbar_LWe7" id="what-is-a-standard-model">What Is A Standard Model?<a href="#what-is-a-standard-model" class="hash-link" aria-label="Direct link to What Is A Standard Model?" title="Direct link to What Is A Standard Model?">​</a></h3>
<p>Every standard model consists of two classes, with each being a Pydantic model.</p>
<ul>
<li><a href="https://raw.githubusercontent.com/OpenBB-finance/OpenBBTerminal/main/openbb_platform/core/openbb_core/provider/abstract/query_params.py" target="_blank" rel="noopener noreferrer"><code>QueryParams</code></a></li>
<li><a href="https://raw.githubusercontent.com/OpenBB-finance/OpenBBTerminal/main/openbb_platform/core/openbb_core/provider/abstract/data.py" target="_blank" rel="noopener noreferrer"><code>Data</code></a></li>
</ul>
<p>Any parameter or field can be assigned a custom <code>field_validator</code>, or the entire model can be passed through a <code>model_validator</code> on creation.</p>
<h3 class="anchor anchorWithStickyNavbar_LWe7" id="caveats">Caveats<a href="#caveats" class="hash-link" aria-label="Direct link to Caveats" title="Direct link to Caveats">​</a></h3>
<p>The standardization framework is a very powerful tool, but it has some caveats that you should be aware of:</p>
<ul>
<li>We standardize fields and parameters that are shared between multiple providers.<!-- -->
<ul>
<li>In some cases, it can be undesirable to define common items in the standard model. In this event, we still want consistent names and descriptions.</li>
</ul>
</li>
<li>When mapping the column names from a provider-specific model to the standard model, the CamelCase to snake_case conversion is done automatically. If the column names are not the same, you&#x27;ll need to manually map them.<!-- -->
<ul>
<li>e.g., <code>__alias_dict__ = {&quot;o&quot;: &quot;open&quot;}</code></li>
</ul>
</li>
<li>The standard models are created and maintained by the OpenBB team. If you want to add or modify a field within a standard model, you&#x27;ll need to open a PR to the OpenBB Platform.</li>
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