TextTag -- the class of a text tag

Methods that use an object of class TextTag :

• pgfObject(TextTag,HashTable) -- create the string describing a circle in pgf
• pictureZone(TextTag) -- find the zone that contains the tag
• svgObject(TextTag,HashTable) -- create the string describing a circle in SVG

For the programmer

The object TextTag is a type, with ancestor classes GraphicPrimitive < BasicList < Thing.