WITSML - Survey Section Component Schema Order in which program sections will be executed / were executed. Name of survey program section. Hole measured depth at which the survey run will begin/began. Hole measured depth at which the survey run will end/ended. Company who will run / has run sruvey tool. Name of survey tool to be used / used for this section. Type of tool used. Error model used to calculate ellipses of uncertainty. Normally true, higher index trajectory takes precedence over overlapping section of previous trajectory. Values are "true" (or "1") and "false" (or "0"). Maximum allowable depth frequency for survey stations for this survey run. The item state for the data object. Comments and remarks. Unique identifier for the section.