Thank you for people who have provided feedback on Tags.
As Kerry has said, tags are a lot more personal than classification systems, and the guidelines were originally produced because people wanted them. For names, people can enter them either in reading order or in index order, whichever is most use to the user who is creating them. When these guidelines are updated this reference will be removed.
The example of "parkes, henry" is there to demonstrate the need to put double-quotes around a tag if it includes a comma.