Entity Types

CORE DRUPAL CONCEPTS	Description
Drupal Entity	The base unit of structured data in Drupal. Anything stored in the system is an entity: a page, a vocabulary term, a user, a file. Entities have a type, an ID, and fields. LEAF: Four node content types in LEAF: Basic Page, Article, Repository Item, Entity Descriptive Record.
Node	A content entity—any piece of content with a URL, fields, and a publish state. All LEAF content types are nodes.
Taxonomy	Drupal's controlled vocabulary system. A Taxonomy Vocabulary is a named set (e.g., "Subjects"); a Taxonomy Term is one entry inside it (e.g., "Digital Humanities"). Both are entities. LEAF: Used for keywords, subject headings, content tags, genres, etc. They can be set up as search facets.