--- title: "Can I specify query parameters for \"Topic Types\" (publications) and \"Role Types\" in North Data API calls?" description: "Learn how \"Topic Types\" and \"Role Types\" are handled in North Data API queries." --- [Skip to content](https://help.northdata.com/en/center/can-i-specify-query-parameters-for-topic-types-publications-and-role-types-in-north-data-api-calls#main-content) - [English](https://help.northdata.com/en/center/can-i-specify-query-parameters-for-topic-types-publications-and-role-types-in-north-data-api-calls) - [Deutsch](https://help.northdata.com/de/center/kann-ich-abfrageparameter-für-topic-types-publikationen-und-role-types-in-north-data-api-anfragen-festlegen) - [Français](https://help.northdata.com/fr/center/puis-je-définir-des-paramètres-de-requête-pour-des-types-de-sujets-publications-et-des-types-de-rôles-dans-les-questions-api-de-north-data) English Show submenu for translations [![northdata-logo.png\]](https://help.northdata.com/hs-fs/hubfs/northdata-logo.png?width=250&height=86&name=northdata-logo.png)](https://www.northdata.com/) Open main navigation Close main navigation - - [English](https://help.northdata.com/en/center/can-i-specify-query-parameters-for-topic-types-publications-and-role-types-in-north-data-api-calls) - [Deutsch](https://help.northdata.com/de/center/kann-ich-abfrageparameter-für-topic-types-publikationen-und-role-types-in-north-data-api-anfragen-festlegen) - [Français](https://help.northdata.com/fr/center/puis-je-définir-des-paramètres-de-requête-pour-des-types-de-sujets-publications-et-des-types-de-rôles-dans-les-questions-api-de-north-data) English Show submenu for translations - [Back to the main page](https://www.northdata.com/) [Back to the main page](https://www.northdata.com/) Hello! How can we help? - There are no suggestions because the search field is empty. 1. [North Data Help Center](https://help.northdata.com/en/center?hsLang=en) 2. [Data Services](https://help.northdata.com/en/center/data-services?hsLang=en) 3. [API](https://help.northdata.com/en/center/data-services?hsLang=en#api) # Can I specify query parameters for "Topic Types" (publications) and "Role Types" in North Data API calls? ## "Topic Types" and "Role Types" cannot be used as specified query parameters, but can be filtered in the API response.  You cannot directly specify "Topic Types" or "Role Types" as query parameters. However, both are included in the API response, so you can filter them afterwards.  #### Handling "Topic Types" in API Queries When querying publication data, the API does not allow you to restrict the response by "Topic Types" The response will include all topics associated with the publication, as defined in the [Publication Structure](https://northdata.github.io/doc/api/#PublicationStructure). To narrow down results to specific topics, you can filter the response data manually. Sorting by topic type or filtering by topic name or value can help you focus on the information that is most relevant. For more details about the available "Topic Types," please refer to [Appendix E: Topic Types](https://github.com/northdata/api/blob/master/doc/data-api-userguide/data-api-userguide.md#appendix-e-topic-types). #### Handling "Role Types" in API Queries The `relatedPersons` field in the API response lists individuals associated with a company. The response will include all roles as defined in the [Role Structure](https://northdata.github.io/doc/api/#Role). To narrow down results to specific roles, you can filter the response data manually. Sorting by role type or filtering by specific attributes can help you focus on the information that is most relevant. For more details about the available "Role Types," refer to [Appendix F: Role Types](https://github.com/northdata/api/blob/master/doc/data-api-userguide/data-api-userguide.md#appendix-f-role-types). ### Conclusion While you cannot specify query parameters for "Topic Types" or "Role Types" in the North Data API, the responses include all relevant data. You can filter and sort the results based on your needs, focusing on the specific topics or roles that are most important for your analysis. - [My Account](https://help.northdata.com/en/center/my-account?hsLang=en#main-content) - [Account & Access](https://help.northdata.com/en/center/my-account?hsLang=en#account-access) - [Subscription & Cancellation](https://help.northdata.com/en/center/my-account?hsLang=en#subscription-cancellation) - [Contact & Support](https://help.northdata.com/en/center/my-account?hsLang=en#contact-support) - [Premium Services](https://help.northdata.com/en/center/premium-services?hsLang=en#main-content) - [General Information](https://help.northdata.com/en/center/premium-services?hsLang=en#general-information) - [Dossier](https://help.northdata.com/en/center/premium-services?hsLang=en#dossier) - [Network diagram](https://help.northdata.com/en/center/premium-services?hsLang=en#network-diagram) - [Watchlist](https://help.northdata.com/en/center/premium-services?hsLang=en#watchlist) - [Ownership & Flags](https://help.northdata.com/en/center/ownership-flags?hsLang=en#main-content) - [General Information](https://help.northdata.com/en/center/ownership-flags?hsLang=en#general-information) - [Ownership Features](https://help.northdata.com/en/center/ownership-flags?hsLang=en#ownership-features) - [Flag Features](https://help.northdata.com/en/center/ownership-flags?hsLang=en#flag-features) - [Data Services](https://help.northdata.com/en/center/data-services?hsLang=en#main-content) - [API](https://help.northdata.com/en/center/data-services?hsLang=en#api) - [Exports](https://help.northdata.com/en/center/data-services?hsLang=en#exports) - [Searching](https://help.northdata.com/en/center/searching?hsLang=en#main-content) - [Simple Search](https://help.northdata.com/en/center/searching?hsLang=en#simple-search) - [Power Search](https://help.northdata.com/en/center/searching?hsLang=en#power-search) - [Sources & Register](https://help.northdata.com/en/center/sources-register?hsLang=en#main-content) - [General Information](https://help.northdata.com/en/center/sources-register?hsLang=en#general-information) - [Germany](https://help.northdata.com/en/center/sources-register?hsLang=en#germany) - [France](https://help.northdata.com/en/center/sources-register?hsLang=en#france) - [Austria](https://help.northdata.com/en/center/sources-register?hsLang=en#austria) - [Netherlands](https://help.northdata.com/en/center/sources-register?hsLang=en#netherlands) - [Czech Republic](https://help.northdata.com/en/center/sources-register?hsLang=en#czech-republic) - [Romania](https://help.northdata.com/en/center/sources-register?hsLang=en#romania) - [Israel](https://help.northdata.com/en/center/sources-register?hsLang=en#israel) - [Denmark](https://help.northdata.com/en/center/sources-register?hsLang=en#denmark) - [Sweden](https://help.northdata.com/en/center/sources-register?hsLang=en#sweden) - [Ireland](https://help.northdata.com/en/center/sources-register?hsLang=en#ireland) - [Norway](https://help.northdata.com/en/center/sources-register?hsLang=en#norway) - [Croatia](https://help.northdata.com/en/center/sources-register?hsLang=en#croatia) - [Company Profile](https://help.northdata.com/en/center/company-profile?hsLang=en#main-content) - [Data Update](https://help.northdata.com/en/center/company-profile?hsLang=en#data-update) - [Person Data](https://help.northdata.com/en/center/company-profile?hsLang=en#person-data) - [Company Data](https://help.northdata.com/en/center/company-profile?hsLang=en#company-data) - [Address Data](https://help.northdata.com/en/center/company-profile?hsLang=en#address-data) - [Industry Classification](https://help.northdata.com/en/center/company-profile?hsLang=en#industry-classification) - [Financial Indicators](https://help.northdata.com/en/center/company-profile?hsLang=en#financial-indicators) - [Data Protection](https://help.northdata.com/en/center/data-protection?hsLang=en#main-content) - [General Information](https://help.northdata.com/en/center/data-protection?hsLang=en#general-information) - [Data Processing](https://help.northdata.com/en/center/data-protection?hsLang=en#data-processing) - [Rights & Protection Options](https://help.northdata.com/en/center/data-protection?hsLang=en#rights-protection-options) - [Glossary](https://help.northdata.com/en/center/glossary?hsLang=en#main-content) - [Classification](https://help.northdata.com/en/center/glossary?hsLang=en#classification) - [Identifiers](https://help.northdata.com/en/center/glossary?hsLang=en#identifiers) - [Key Performance Indicators](https://help.northdata.com/en/center/glossary?hsLang=en#key-performance-indicators) - [Status & Events](https://help.northdata.com/en/center/glossary?hsLang=en#status-events) - [Legal Forms & Organisation](https://help.northdata.com/en/center/glossary?hsLang=en#legal-forms-organisation) - [Ownership & Flags](https://help.northdata.com/en/center/glossary?hsLang=en#ownership-flags) - [Market Intelligence](https://help.northdata.com/en/center/glossary?hsLang=en#market-intelligence) North Data Help Center Copyright © 2025, North Data GmbH