A well is a facility defined by its function to extract fluids from within the earth. A well may be a simple hole in the ground (generally not the kind of wells we're interested in here...), but in general will consist of a dug shaft or drilled borehole. Drilled wells may include one or more boreholes (well bores) that are accessed from the surface at an origin collar, which defines the origin of the well. Individual boreholes in the well my have origin points (collars) that are located within existing boreholes in the well (e.g. sidetracks). The most common situation, especially for water wells, is a well consisting of a single borehole with a collar that is coincident with the well origin.
Well header features represent individual wells, and are the anchor for a variety of observations and other features.
The Well Header URI for a particular well is the cross-referencing link (foreign key) used to associate the well record, temperature measurements, chemistry and other information from a particular well. Each entry is for one well borehole.
Multiple observations (such as: temperature observations, chemical analyses) from the same well would be entered on separate, appropriate spreadsheets/templates. If these separate observations exist, there should be a link to them entered on the Well Header template, entered under Related Resources.