Are there standard metrics to gauge content quality?

One aspect of user experience in a software application or website is the quality of the content presented to the user. It probably comes as no surprise that if the quality of the content is low/poor, then the user will have a difficult time getting a good user experience from trying to achieve his/her goals. The content is generally a mixture of the visual and text that the user processes, so I imagine that there would be a combination of metrics used to assess the visual quality (like aesthetics, contrast) and text quality (like readability, legibility). I would like to know if there are any standard metrics used to measure the relative degree of quality of content that takes into account of various elements that comprise of information quality, and how this relates to the overall user experience.