Here is a list of all enum values with links to the classes they belong to:

• bufcapacity : xml_buffered_writer
• bufcapacitybytes : xml_buffered_writer
• type_sorted : pugi::xpath_node_set
• type_sorted_reverse : pugi::xpath_node_set
• type_unsorted : pugi::xpath_node_set
• value : opt_false, opt_true