This function returns the content of a document as an object of type hw_api_content. The parameter array contains the required elements 'objectidentifier' and the optional element 'mode'. The mode can be one of the constants HW_API_CONTENT_ALLLINKS, HW_API_CONTENT_REACHABLELINKS or HW_API_CONTENT_PLAIN. HW_API_CONTENT_ALLLINKS means to insert all anchors even if the destination is not reachable. HW_API_CONTENT_REACHABLELINKS tells hw_api_content() to insert only reachable links and HW_API_CONTENT_PLAIN will lead to document without any links.