This blog post provides perspective on the term block as it is used in content management systems, specifically the Contentstack SaaS headless CMS. This post is a member of the following glossary:
Update 15.Dec.2025: After years of frustration with WordPress, I am finally abandoning this blog. The content will likely stay here for some time, but new content will appear here:
A block is a group of fields. A content type can define a block structure as a flat list of simple fields. A block based on a content type that defines Title and Description fields may appear as follows.
{
title: "My Title",
description: "My Description"
}
In Contentstack, group fields, global fields, and individual blocks within modular blocks fields also define block structures.
- Contentstack JSON Data Formats: Introduction and Scalars – Deliverystack.net
- Contentstack JSON Data Formats: Modular Blocks Fields – Deliverystack.net
Group fields are collections of fields in a content type, where that group can be a flat list of fields or a further nested field structure. Global fields are like group fields that are reusable between content types. Modular blocks fields allow much more flexible block structures within a single field value.
deliverystack.net 
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