Jahia is based on JSR 283. each content item is stored as a node in the repository, each node has a a unique identifier (UUID) and a unique path from the repository root level. A node can have 0 to n child. Each item is accessible through its path, absolute from the repository root node, or relative from the current node. in the following pages are explained the basic informations about content modeling, We strongly recommand developpers to read and rely on the JCR 2.0 specification and notably the repository model.