| Sorting Lists of Content Items
                          Frequently, you will need to get a list of content items in sorted order.
                          WebMake itself does this for the sitemap tag, among others.
                          
                         
                          Sorting is typically performed using a content item's metadata; some metadata
                          that are especially useful are:
                          
                         
                          
                            score
                          
                            
                              A number representing the "priority" of a content
                               item; specifically intended for use when sorting. Defaults to 50
                               if unset.
                              
                            
                            title
                          
                            
                              The title of a content item. Handy for alphabetic
                               lists. Defaults to (Untitled) if not set.
                              
                            
                            declared
                          
                            
                              The item's declaration order. This is a number
                               representing when the content item was first encountered in the
                               WebMake file; earlier content items have a lower declaration order.
                               You do not need to set this; WebMake will do so automatically.
                              
                            
                            mtime
                          
                            
                              The modification date, in UNIX time_t
                               seconds-since-the-epoch format, of the file the content item was
                               loaded from.
                              
                            
                            name
                          
                            
                              The name of the content item.
                              
                             
                          WebMake provides a built-in mechanism to allow easy sorting of content items,
                          called a sort spec or sort string.
                          
                         
                          This is typically used either with the Perl code library's
                          sort_content_objects()call, or using asortorderattribute as the sitemap tag does. 
                          A sort string is a text string, containing a space-separated list of metadata
                          items. The first entry in the list is the main sorting criterion; the second
                          entry is then used to break deadlocks if two entries match for the main
                          criterion, etc.
                          
                         
                          In addition, a metadata item can be prefixed with a !, to reverse its
                          order. Example
                          score title: sort by score, and if two content items have the same
                          score, sort by title.
                          
                         
                          declared: sort by the order in which they were declared in the WebMake
                          file.
                          
                         
                          score title !mtime: sort by score and title, and if more than one content
                          item have the same score and title, sort them into oldest-first order.
                          
                         
                          
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