Hello,
It should be possible to access all columns from
CMS_Tree,
CMS_Document and
Coupled table of the current document by using context macros.
Coupled table is a table that contains document-type specific fields defined by the developer. For example the News document type has a Content_News coupled table that contains NewsTitle, NewsSummary, NewsText and other fields specific for news.
Some related information can be found here:
Content management internalsBest regards,
Michal Legen