If punctuation other than spaces is needed to separate entries in a stacked control entry, a single standard symbol should be used for that purpose.
Additional Information:
A slash (/) is often used to separate stacked entries. Whatever symbol is adopted as a delimiter for control entries should preferably be the same as any delimiter that might be used when making data entries. Note that even when a standard symbol is consistently used to punctuate stacked entries, entry will be slower and less accurate than if only spaces are used for punctuation.