addr:Separator_type

A symbol or word required as a separator between
components of a complex element or class. The separator
is required for address number ranges and for
intersection addresses, and it is occasionally needed in
constructing complete street numbers.
1. The default separator, an empty space, is implicit
and is not shown in the syntaxes of complex elements and
classes. 2. An explicit separator is required for
address ranges and intersection addresses. 3. Within a
given dataset, one value should be used consistently
within a given complex element. 4. For complete street
numbers, the separator is rarely needed and its use
should be minimized. As an alternative, the separator
symbol usually can be included with the address number
prefix or suffix. 5. The separator is not needed in
creating fractions (1/2, etc.) for address number
suffixes. 6. Some address parsing softaware permits the
use of ampersands to signify intersection addresses. Be
wary, though--in many programming languages, ampersands
are reserved for other uses, which could complicate data
exchange.