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<title data-rh="true">Components | DataHub</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://docs.datahub.com/docs/components"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="Components | DataHub"><meta data-rh="true" name="description" content="The DataHub platform consists of the components shown in the following diagram."><meta data-rh="true" property="og:description" content="The DataHub platform consists of the components shown in the following diagram."><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://docs.datahub.com/docs/components"><link data-rh="true" rel="alternate" href="https://docs.datahub.com/docs/components" hreflang="en"><link data-rh="true" rel="alternate" href="https://docs.datahub.com/docs/components" hreflang="x-default"><link data-rh="true" rel="preconnect" href="https://RK0UG797F3-dsn.algolia.net" crossorigin="anonymous"><link rel="alternate" type="application/rss+xml" href="/learn/rss.xml" title="DataHub RSS Feed">
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<script id="runllm-widget-script" type="module" src="https://widget.runllm.com" crossorigin="true" runllm-name="DataHub" runllm-assistant-id="81" runllm-position="BOTTOM_RIGHT" runllm-keyboard-shortcut="Mod+j" runllm-preset="docusaurus" runllm-theme-color="#1890FF" runllm-brand-logo="https://docs.datahub.com/img/datahub-logo-color-mark.svg" runllm-community-url="https://datahub.com/slack" runllm-community-type="slack" runllm-disable-ask-a-person="true" async></script><link rel="stylesheet" href="/assets/css/styles.70c656f4.css">
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<div role="region" aria-label="Skip to main content"><a class="skipToContent_fXgn" href="#__docusaurus_skipToContent_fallback">Skip to main content</a></div><div class="announcementBar_mb4j" style="background-color:transparent;color:#ffffff" role="banner"><div class="content_knG7 announcementBarContent_xLdY"><div class="shimmer-banner"><p>DataHub Secures $35 Million Series B</p><a href="https://datahub.com/news/series-b-announcement/" target="_blank" class="button"><div>Read the announcement<span> →</span></div></a></div></div></div><nav aria-label="Main" class="navbar navbar--fixed-top"><div class="navbar__inner"><div class="navbar__items"><button aria-label="Toggle navigation bar" aria-expanded="false" class="navbar__toggle clean-btn" type="button"><svg width="30" height="30" viewBox="0 0 30 30" aria-hidden="true"><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></button><a href="https://datahub.com" target="_blank" rel="noopener noreferrer" class="navbar__brand"><div class="navbar__logo"><img src="/img/datahub-logo-color-light-horizontal.svg" alt="DataHub Logo" class="themedImage_ToTc themedImage--light_HNdA"><img src="/img/datahub-logo-color-dark-horizontal.svg" alt="DataHub Logo" class="themedImage_ToTc themedImage--dark_i4oU"></div></a><div class="navbar__item dropdown dropdown--hoverable"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link versionNavItem_cbn8">Next</a><ul class="dropdown__menu"><li><a aria-current="page" class="dropdown__link dropdown__link--active" href="/docs/components">Next</a></li><li><a class="dropdown__link" href="/docs/1.1.0/components">1.1.0</a></li><li><a class="dropdown__link" href="/docs/1.0.0/components">1.0.0</a></li><li><hr class="dropdown-separator" style="margin: 0.4rem;"></li><li><div class="dropdown__link"><b>Archived versions</b></div></li><li>
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</li></ul></div></div><div class="navbar__items navbar__items--right"><a aria-current="page" class="navbar__item navbar__link navbar__link--active" href="/docs">Docs</a><a class="navbar__item navbar__link" href="/integrations">Integrations</a><div class="navbar__item dropdown dropdown--hoverable"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link">Learn</a><ul class="dropdown__menu dropdown__menu_Z8FC"><div class="wrapper_kp81"><div><a href="https://datahub.com/weekly-demo" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-join-slack.png" alt="Weekly Demo"></div><div class="title_c7DP">Weekly Demo</div></a></div><div><a href="https://datahub.com/use-cases" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-forum.png" alt="Use Cases"></div><div class="title_c7DP">Use Cases</div></a></div><div><a href="httpps://datahub.com/adoption-stories" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-events.png" alt="Adoption Stories"></div><div class="title_c7DP">Adoption Stories</div></a></div><div><a href="https://medium.com/datahub-project" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-champions.png" alt="Blog"></div><div class="title_c7DP">Blog</div></a></div><div><a href="https://www.youtube.com/channel/UC3qFQC5IiwR5fvWEqi_tJ5w" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-share-your-journey.png" alt="Youtube"></div><div class="title_c7DP">Youtube</div></a></div></div></ul></div><div class="navbar__item dropdown dropdown--hoverable"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link">Community</a><ul class="dropdown__menu dropdown__menu_Z8FC"><div class="wrapper_kp81"><div><a href="https://datahub.com/slack/" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-join-slack.png" alt="Join Slack"></div><div class="title_c7DP">Join Slack</div></a></div><div><a href="https://datahub.com/events" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-events.png" alt="Events"></div><div class="title_c7DP">Events</div></a></div><div><a href="https://datahub.com/champions/" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-champions.png" alt="Champions"></div><div class="title_c7DP">Champions</div></a></div><div><a href="https://datahub.com/share-your-journey/" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-share-your-journey.png" alt="Share Your Journey"></div><div class="title_c7DP">Share Your Journey</div></a></div></div></ul></div><a href="https://datahub.com/products/why-datahub-cloud/" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link">
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<style>
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.cloud-cta {
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color: var(--ifm-menu-color-active);
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font-weight: 600;
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background: linear-gradient(40deg, var(--ifm-menu-color-active), var(--ifm-menu-color-active));
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background-size: 200% 100%;
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-webkit-background-clip: text;
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background-clip: text;
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transition: background-image 0.3s ease;
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}
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.cloud-cta:hover {
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color: transparent;
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background: linear-gradient(40deg, var(--ifm-menu-color-active), #ff1493);
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background-size: 200% 100%;
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-webkit-background-clip: text;
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background-clip: text;
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animation: gradientShift 3s ease infinite;
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}
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@keyframes gradientShift {
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0%, 100% { background-position: 0% 50%; }
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50% { background-position: 100% 50%; }
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}
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</style>
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<div class="cloud-cta">Get Cloud</div>
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</a><a href="https://datahub.com/slack?utm_source=docs&utm_medium=header&utm_campaign=docs_header" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link">
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<style>
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opacity: 0.8;
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<img class="slack-logo" src="https://upload.wikimedia.org/wikipedia/commons/d/d5/Slack_icon_2019.svg" , alt="slack" , height="20px" style="margin: 10px 0 0 0;">
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menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" href="/docs/metadata-ingestion">Overview</a><button aria-label="Toggle the collapsible sidebar category 'Overview'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/metadata-ingestion/cli-ingestion">Quickstart Guides</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist" aria-expanded="false" href="/docs/metadata-ingestion/source_overview">Sources</a><button aria-label="Toggle the collapsible sidebar category 'Sources'" type="button" class="clean-btn menu__caret"></button></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/metadata-ingestion/schedule_docs/intro">Advanced Guides</a></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menuHtmlItem_M9Kj menu__list-item"><div>API & SDKs</div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/metadata-modeling/metadata-model">DataHub's Open Metadata Standard</a></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a 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href="/docs/architecture/metadata-serving">Serving Tier</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/docs/architecture/docker-containers">Docker Container Architecture</a></li></ul></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/developers">Developing on DataHub</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/advanced/mcp-mcl">Advanced Guides</a></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 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class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">Architecture</span><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Components</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: Next</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>DataHub Components Overview</h1><p>The DataHub platform consists of the components shown in the following diagram.</p><p align="center"><img loading="lazy" width="70%" src="https://raw.githubusercontent.com/datahub-project/static-assets/main/imgs/datahub-components.png" class="img_ev3q"></p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="metadata-store">Metadata Store<a href="#metadata-store" class="hash-link" aria-label="Direct link to Metadata Store" title="Direct link to Metadata Store"></a></h2><p>The Metadata Store is responsible for storing the <a href="/docs/metadata-modeling/metadata-model/">Entities & Aspects</a> comprising the Metadata Graph. This includes
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exposing an API for <a href="/docs/metadata-service#ingesting-entities">ingesting metadata</a>, <a href="/docs/metadata-service#retrieving-entities">fetching Metadata by primary key</a>, <a href="/docs/metadata-service#search-an-entity">searching entities</a>, and <a href="/docs/metadata-service#get-relationships-edges">fetching Relationships</a> between
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entities. It consists of a Spring Java Service hosting a set of <a href="https://linkedin.github.io/rest.li/" target="_blank" rel="noopener noreferrer">Rest.li</a> API endpoints, along with
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MySQL, Elasticsearch, & Kafka for primary storage & indexing.</p><p>Get started with the Metadata Store by following the <a href="/docs/quickstart/">Quickstart Guide</a>.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="metadata-models">Metadata Models<a href="#metadata-models" class="hash-link" aria-label="Direct link to Metadata Models" title="Direct link to Metadata Models"></a></h2><p>Metadata Models are schemas defining the shape of the Entities & Aspects comprising the Metadata Graph, along with the relationships between them. They are defined
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using <a href="https://linkedin.github.io/rest.li/pdl_schema" target="_blank" rel="noopener noreferrer">PDL</a>, a modeling language quite similar in form to Protobuf while serializes to JSON. Entities represent a specific class of Metadata
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Asset such as a Dataset, a Dashboard, a Data Pipeline, and beyond. Each <em>instance</em> of an Entity is identified by a unique identifier called an <code>urn</code>. Aspects represent related bundles of data attached
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to an instance of an Entity such as its descriptions, tags, and more. View the current set of Entities supported <a href="/docs/metadata-modeling/metadata-model#exploring-datahubs-metadata-model">here</a>.</p><p>Learn more about DataHub models Metadata <a href="/docs/metadata-modeling/metadata-model/">here</a>.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="ingestion-framework">Ingestion Framework<a href="#ingestion-framework" class="hash-link" aria-label="Direct link to Ingestion Framework" title="Direct link to Ingestion Framework"></a></h2><p>The Ingestion Framework is a modular, extensible Python library for extracting Metadata from external source systems (e.g.
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Snowflake, Looker, MySQL, Kafka), transforming it into DataHub's <a href="/docs/metadata-modeling/metadata-model/">Metadata Model</a>, and writing it into DataHub via
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either Kafka or using the Metadata Store Rest APIs directly. DataHub supports an <a href="/docs/metadata-ingestion/#installing-plugins">extensive list of Source connectors</a> to choose from, along with
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a host of capabilities including schema extraction, table & column profiling, usage information extraction, and more.</p><p>Getting started with the Ingestion Framework is as simple: just define a YAML file and execute the <code>datahub ingest</code> command.
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Learn more by heading over the <a href="/docs/metadata-ingestion/">Metadata Ingestion</a> guide.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="graphql-api">GraphQL API<a href="#graphql-api" class="hash-link" aria-label="Direct link to GraphQL API" title="Direct link to GraphQL API"></a></h2><p>The <a href="https://graphql.org/" target="_blank" rel="noopener noreferrer">GraphQL</a> API provides a strongly-typed, entity-oriented API that makes interacting with the Entities comprising the Metadata
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Graph simple, including APIs for adding and removing tags, owners, links & more to Metadata Entities! Most notably, this API is consumed by the User Interface (discussed below) for enabling Search & Discovery, Governance, Observability
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and more.</p><p>To get started using the GraphQL API, check out the <a href="/docs/api/graphql/getting-started">Getting Started with GraphQL</a> guide.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="user-interface">User Interface<a href="#user-interface" class="hash-link" aria-label="Direct link to User Interface" title="Direct link to User Interface"></a></h2><p>DataHub comes with a React UI including an ever-evolving set of features to make Discovering, Governing, & Debugging your Data Assets easy & delightful.
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For a full overview of the capabilities currently supported, take a look at the <a href="/docs/features">Features</a> overview. For a look at what's coming next,
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head over to the <a href="/docs/roadmap/">Roadmap</a>.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="learn-more">Learn More<a href="#learn-more" class="hash-link" aria-label="Direct link to Learn More" title="Direct link to Learn More"></a></h2><p>Learn more about the specifics of the <a href="/docs/architecture/architecture">DataHub Architecture</a> in the Architecture Overview. Learn about using & developing the components
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of the Platform by visiting the Module READMEs.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="feedback--questions--concerns">Feedback / Questions / Concerns<a href="#feedback--questions--concerns" class="hash-link" aria-label="Direct link to Feedback / Questions / Concerns" title="Direct link to Feedback / Questions / Concerns"></a></h2><p>We want to hear from you! For any inquiries, including Feedback, Questions, or Concerns, reach out on <a href="https://datahubspace.slack.com/join/shared_invite/zt-nx7i0dj7-I3IJYC551vpnvvjIaNRRGw#/shared-invite/email" target="_blank" rel="noopener noreferrer">Slack</a>!</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="slackUtm_uoBr"><div class="slackUtm_uoBr"><hr>Need more help? 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19a56.76 56.76 0 0119.6 43c0 9.7-2.3 18.9-6.9 27.3l-14 25.5 21.9 19a56.76 56.76 0 0119.6 43c0 19.1-11 37.5-28.8 48.4z"></path></svg></span></button></div></div></div></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/docs/architecture/architecture"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Overview</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/docs/architecture/metadata-ingestion"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Ingestion Framework</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#metadata-store" class="table-of-contents__link toc-highlight">Metadata Store</a></li><li><a href="#metadata-models" 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