An anchor name is the value of either the name or id attribute when used in the context of anchors.
It is often that developers find themselves using the anchor names incorrectly.
According to SSW and W3C, anchor names must observe the following rules:
([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".")#