observe_survey_result_columns/3
Add header columns for export. The values are the names of the answers and the text displayed above the column. The
text format is for a complete export, the html format is for the limited result overview of the Survey Results Editor.
Type:
Return:
list( {binary(), binary() | #trans{}} )
#survey_result_columns{} properties:
id:
m_rsc:resource_id()handler:
binary|undefinedformat:
html|text