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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 itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Concepts</span><meta itemprop="position" content="1"></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 Concepts</h1><p>Explore key concepts of DataHub to take full advantage of its capabilities in managing your data.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="general-concepts">General Concepts<a href="#general-concepts" class="hash-link" aria-label="Direct link to General Concepts" title="Direct link to General Concepts"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="urn-uniform-resource-name">URN (Uniform Resource Name)<a href="#urn-uniform-resource-name" class="hash-link" aria-label="Direct link to URN (Uniform Resource Name)" title="Direct link to URN (Uniform Resource Name)"></a></h3><p>URN (Uniform Resource Name) is the chosen scheme of URI to uniquely define any resource in DataHub. It has the following form.</p><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token plain">urn:<Namespace>:<Entity Type>:<ID></span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>Examples include <code>urn:li:dataset:(urn:li:dataPlatform:hive,fct_users_created,PROD)</code>, <code>urn:li:corpuser:jdoe</code>.</p><blockquote><ul><li><a href="/docs/what/urn">What is URN?</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="policy">Policy<a href="#policy" class="hash-link" aria-label="Direct link to Policy" title="Direct link to Policy"></a></h3><p>Access policies in DataHub define who can do what to which resources.</p><blockquote><ul><li><a href="/docs/authorization/policies">Authorization: Policies Guide</a></li><li><a href="/docs/generated/metamodel/entities/datahubpolicy">Developer Guides: DataHubPolicy</a></li><li><a href="/docs/authorization/access-policies-guide">Feature Guides: About DataHub Access Policies</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="role">Role<a href="#role" class="hash-link" aria-label="Direct link to Role" title="Direct link to Role"></a></h3><p>DataHub provides the ability to use Roles to manage permissions.</p><blockquote><ul><li><a href="/docs/authorization/roles">Authorization: About DataHub Roles</a></li><li><a href="/docs/generated/metamodel/entities/datahubrole">Developer Guides: DataHubRole</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="access-token-personal-access-token">Access Token (Personal Access Token)<a href="#access-token-personal-access-token" class="hash-link" aria-label="Direct link to Access Token (Personal Access Token)" title="Direct link to Access Token (Personal Access Token)"></a></h3><p>Personal Access Tokens, or PATs for short, allow users to represent themselves in code and programmatically use DataHub's APIs in deployments where security is a concern.
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Used along-side with <a href="/docs/authentication/introducing-metadata-service-authentication">authentication-enabled metadata service</a>, PATs add a layer of protection to DataHub where only authorized users are able to perform actions in an automated way.</p><blockquote><ul><li><a href="/docs/authentication/personal-access-tokens">Authentication: About DataHub Personal Access Tokens</a></li><li><a href="/docs/generated/metamodel/entities/datahubaccesstoken">Developer Guides: DataHubAccessToken</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="view">View<a href="#view" class="hash-link" aria-label="Direct link to View" title="Direct link to View"></a></h3><p>Views allow you to save and share sets of filters for reuse when browsing DataHub. A view can either be public or personal.</p><blockquote><ul><li><a href="/docs/generated/metamodel/entities/datahubview">DataHubView</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="deprecation">Deprecation<a href="#deprecation" class="hash-link" aria-label="Direct link to Deprecation" title="Direct link to Deprecation"></a></h3><p>Deprecation is an aspect that indicates the deprecation status of an entity. Typically it is expressed as a Boolean value.</p><blockquote><ul><li><a href="/docs/generated/metamodel/entities/dataset#deprecation">Deprecation of a dataset</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="ingestion-source">Ingestion Source<a href="#ingestion-source" class="hash-link" aria-label="Direct link to Ingestion Source" title="Direct link to Ingestion Source"></a></h3><p>Ingestion sources refer to the data systems that we are extracting metadata from. For example, we have sources for BigQuery, Looker, Tableau and many others.</p><blockquote><ul><li><a href="/docs/metadata-ingestion#sources">Sources</a></li><li><a href="/integrations">DataHub Integrations</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="container">Container<a href="#container" class="hash-link" aria-label="Direct link to Container" title="Direct link to Container"></a></h3><p>A container of related data assets.</p><blockquote><ul><li><a href="/docs/generated/metamodel/entities/container">Developer Guides: Container</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="data-platform">Data Platform<a href="#data-platform" class="hash-link" aria-label="Direct link to Data Platform" title="Direct link to Data Platform"></a></h3><p>Data Platforms are systems or tools that contain Datasets, Dashboards, Charts, and all other kinds of data assets modeled in the metadata graph.</p><details class="details_lb9f alert alert--info details_b_Ee" data-collapsed="true"><summary>List of Data Platforms</summary><div><div class="collapsibleContent_i85q"><ul><li>Azure Data Lake (Gen 1)</li><li>Azure Data Lake (Gen 2)</li><li>Airflow</li><li>Ambry</li><li>ClickHouse</li><li>Couchbase</li><li>External Source</li><li>HDFS</li><li>SAP HANA</li><li>Hive</li><li>Iceberg</li><li>AWS S3</li><li>Kafka</li><li>Kafka Connect</li><li>Kusto</li><li>Mode</li><li>MongoDB</li><li>MySQL</li><li>MariaDB</li><li>OpenAPI</li><li>Oracle</li><li>Pinot</li><li>PostgreSQL</li><li>Presto</li><li>Tableau</li><li>Vertica</li></ul><p>Reference : <a href="https://github.com/datahub-project/datahub/blob/master/metadata-service/configuration/src/main/resources/bootstrap_mcps/data-platforms.yaml" target="_blank" rel="noopener noreferrer">data_platforms.yaml</a></p></div></div></details><blockquote><ul><li><a href="/docs/generated/metamodel/entities/dataplatform">Developer Guides: Data Platform</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="dataset">Dataset<a href="#dataset" class="hash-link" aria-label="Direct link to Dataset" title="Direct link to Dataset"></a></h3><p>Datasets represent collections of data that are typically represented as Tables or Views in a database (e.g. BigQuery, Snowflake, Redshift etc.), Streams in a stream-processing environment (Kafka, Pulsar etc.), bundles of data found as Files or Folders in data lake systems (S3, ADLS, etc.).</p><blockquote><ul><li><a href="/docs/generated/metamodel/entities/dataset">Developer Guides: Dataset</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="chart">Chart<a href="#chart" class="hash-link" aria-label="Direct link to Chart" title="Direct link to Chart"></a></h3><p>A single data vizualization derived from a Dataset. A single Chart can be a part of multiple Dashboards. Charts can have tags, owners, links, glossary terms, and descriptions attached to them. Examples include a Superset or Looker Chart.</p><blockquote><ul><li><a href="/docs/generated/metamodel/entities/chart">Developer Guides: Chart</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="dashboard">Dashboard<a href="#dashboard" class="hash-link" aria-label="Direct link to Dashboard" title="Direct link to Dashboard"></a></h3><p>A collection of Charts for visualization. Dashboards can have tags, owners, links, glossary terms, and descriptions attached to them. Examples include a Superset or Mode Dashboard.</p><blockquote><ul><li><a href="/docs/generated/metamodel/entities/dashboard">Developer Guides: Dashboard</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="data-job">Data Job<a href="#data-job" class="hash-link" aria-label="Direct link to Data Job" title="Direct link to Data Job"></a></h3><p>An executable job that processes data assets, where "processing" implies consuming data, producing data, or both.
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In orchestration systems, this is sometimes referred to as an individual "Task" within a "DAG". Examples include an Airflow Task.</p><blockquote><ul><li><a href="/docs/generated/metamodel/entities/datajob">Developer Guides: Data Job</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="data-flow">Data Flow<a href="#data-flow" class="hash-link" aria-label="Direct link to Data Flow" title="Direct link to Data Flow"></a></h3><p>An executable collection of Data Jobs with dependencies among them, or a DAG.
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Sometimes referred to as a "Pipeline". Examples include an Airflow DAG.</p><blockquote><ul><li><a href="/docs/generated/metamodel/entities/dataflow">Developer Guides: Data Flow</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="glossary-term">Glossary Term<a href="#glossary-term" class="hash-link" aria-label="Direct link to Glossary Term" title="Direct link to Glossary Term"></a></h3><p>Shared vocabulary within the data ecosystem.</p><blockquote><ul><li><a href="/docs/glossary/business-glossary">Feature Guides: Glossary</a></li><li><a href="/docs/generated/metamodel/entities/glossaryterm">Developer Guides: GlossaryTerm</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="glossary-term-group">Glossary Term Group<a href="#glossary-term-group" class="hash-link" aria-label="Direct link to Glossary Term Group" title="Direct link to Glossary Term Group"></a></h3><p>Glossary Term Group is similar to a folder, containing Terms and even other Term Groups to allow for a nested structure.</p><blockquote><ul><li><a href="/docs/glossary/business-glossary#terms--term-groups">Feature Guides: Term & Term Group</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="tag">Tag<a href="#tag" class="hash-link" aria-label="Direct link to Tag" title="Direct link to Tag"></a></h3><p>Tags are informal, loosely controlled labels that help in search & discovery. They can be added to datasets, dataset schemas, or containers, for an easy way to label or categorize entities – without having to associate them to a broader business glossary or vocabulary.</p><blockquote><ul><li><a href="/docs/tags">Feature Guides: About DataHub Tags</a></li><li><a href="/docs/generated/metamodel/entities/tag">Developer Guides: Tags</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="domain">Domain<a href="#domain" class="hash-link" aria-label="Direct link to Domain" title="Direct link to Domain"></a></h3><p>Domains are curated, top-level folders or categories where related assets can be explicitly grouped.</p><blockquote><ul><li><a href="/docs/domains">Feature Guides: About DataHub Domains</a></li><li><a href="/docs/generated/metamodel/entities/domain">Developer Guides: Domain</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="owner">Owner<a href="#owner" class="hash-link" aria-label="Direct link to Owner" title="Direct link to Owner"></a></h3><p>Owner refers to the users or groups that has ownership rights over entities. For example, owner can be acceessed to dataset or a column or a dataset.</p><blockquote><ul><li><a href="/docs/api/tutorials/owners#add-owners">Getting Started : Adding Owners On Datasets/Columns</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="users-corpuser">Users (CorpUser)<a href="#users-corpuser" class="hash-link" aria-label="Direct link to Users (CorpUser)" title="Direct link to Users (CorpUser)"></a></h3><p>CorpUser represents an identity of a person (or an account) in the enterprise.</p><blockquote><ul><li><a href="/docs/generated/metamodel/entities/corpuser">Developer Guides: CorpUser</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="groups-corpgroup">Groups (CorpGroup)<a href="#groups-corpgroup" class="hash-link" aria-label="Direct link to Groups (CorpGroup)" title="Direct link to Groups (CorpGroup)"></a></h3><p>CorpGroup represents an identity of a group of users in the enterprise.</p><blockquote><ul><li><a href="/docs/generated/metamodel/entities/corpgroup">Developer Guides: CorpGroup</a></li></ul></blockquote><h2 class="anchor anchorWithStickyNavbar_LWe7" id="metadata-model">Metadata Model<a href="#metadata-model" class="hash-link" aria-label="Direct link to Metadata Model" title="Direct link to Metadata Model"></a></h2><h3 class="anchor anchorWithStickyNavbar_LWe7" id="entity">Entity<a href="#entity" class="hash-link" aria-label="Direct link to Entity" title="Direct link to Entity"></a></h3><p>An entity is the primary node in the metadata graph. For example, an instance of a Dataset or a CorpUser is an Entity.</p><blockquote><ul><li><a href="/docs/metadata-modeling/metadata-model">How does DataHub model metadata?</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="aspect">Aspect<a href="#aspect" class="hash-link" aria-label="Direct link to Aspect" title="Direct link to Aspect"></a></h3><p>An aspect is a collection of attributes that describes a particular facet of an entity.
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Aspects can be shared across entities, for example "Ownership" is an aspect that is re-used across all the Entities that have owners.</p><blockquote><ul><li><a href="/docs/what/aspect">What is a metadata aspect?</a></li><li><a href="/docs/metadata-modeling/metadata-model">How does DataHub model metadata?</a></li></ul></blockquote><h3 class="anchor anchorWithStickyNavbar_LWe7" id="relationships">Relationships<a href="#relationships" class="hash-link" aria-label="Direct link to Relationships" title="Direct link to Relationships"></a></h3><p>A relationship represents a named edge between 2 entities. They are declared via foreign key attributes within Aspects along with a custom annotation (@Relationship).</p><blockquote><ul><li><a href="/docs/what/relationship">What is a relationship?</a></li><li><a href="/docs/metadata-modeling/metadata-model">How does DataHub model metadata?</a></li></ul></blockquote></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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