• The fresh lexical place out-of a symbol space are a low-blank number of Unicode reputation chain.
• New identifier regarding an icon space is a sequence out-of Unicode letters one to setting an absolute IRI [RFC-3987].
• Other symbol places don’t show the same identifier.

To simplify the language, we will often use symbol space identifiers to refer to the actual symbol spaces (for instance, we may use “symbol space xs:string” instead of “symbol space identified by xs:string“).