rdf_template_variable_wrapper does not work for unrendered template variables

This is may be by design, but I thought it was worth noting.

The function rdf_process uses $variables[$variable_name] to set the content that goes inside the wrapping tag. This works fine for date and created because $variables[$variable_name] is the string of rendered HTML, as it is for most template variables.

However, the content variable and the contained elements in taxonomy_term are arrays. So if we try to use rdf_template_variable_wrapper in rdf_preprocess_taxonomy_term, the HTML output is simply the string 'Array' instead of the actual HTML content.

The content variable is an array when it reaches rdf_process in the following cases:

• taxonomy_term
• node (comment, links, and taxonomy)
• comment_wrapper
• user_profile

We could potentially 'fix' this by checking to see if '#markup' is set and then operating on '#markup' if it is. This opens up the potential to insert RDF wrapping tags around just the internal markup of a variable if prefix and suffix are set.

We have ways to get around this problem in every case except taxonomy_term, but allowing people to pass unrendered variables in may provide a helpful amount of flexibility.