From A List Apart –Content Modelling: A Master Skill:
The content model is one of the most important content strategy tools at your disposal. It allows you to represent content in a way that translates the intention, stakeholder needs, and functional requirements from the user experience design into something that can be built by developers implementing a CMS. A good content model helps ensure that your content vision will become a reality. Lovinger explains how to craft a strong content model and use it to foster communication and align efforts between the UX design, editorial, and technical team members on your project.