# Online Store 2.0: New metafields type system and dynamic sources — Shopify developer changelog
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## Online Store 2.0: New metafields type system and dynamic sources

We've released a new commerce-oriented type system for metafields. Metafields that are created with these new types from our APIs are now more interoperable across our system. 

You can use the type system through a new `type` field that replaces the existing `valueType` field, which is now deprecated. To make the migration easier, this is a non-breaking change. The deprecated `valueType` field will be removed in 2022-01.

To learn more about the API changes, refer to the API specific reference documentation:

* [Admin REST API](https://shopify.dev/api/admin-rest/latest/resources/metafield)
* [Admin GraphQL API](https://shopify.dev/api/admin-graphql/latest/objects/Metafield)
* [Storefront API reference](https://shopify.dev/api/storefront/latest/objects/metafield)

If you’re a theme developers, then you can now use [dynamic sources](https://shopify.dev/themes/architecture/settings#dynamic-sources) to insert standard metafields and known resource properties as setting defaults.

Learn more about the type system and how to migrate to it in the [Metafields documentation](https://shopify.dev/apps/metafields/definitions/types).

*Published: June 29, 2021*
Tags: API, Deprecation Announcement
Link: https://shopify.dev/changelog/online-store-2-0-new-metafields-type-system-and-dynamic-sources

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