Alfresco supports an extensive set of permissions, in order to provide security controls. It also supports a set of roles by grouping these permissions. The security permissions and roles can be extended. However, before extending the permissions and roles, you need to evaluate and understand the existing permissions and roles, and justify the decision for extending them.
Alfresco supports a number of permissions to access the spaces, content, their properties, and so on. The following are some of the permissions for spaces:
_ReadProperties: Reads the space's properties
_ReadChildren: Reads the content within a space
_WriteProperties: Updates properties such as title, description, and so on ...