SNAX/XF and SNAX/APN Event Management Programming Manual

Glossary
SNAX/XF and SNAX/APN Event Management Programming Manual—426859-001
Glossary-20
token code
token code. A 32-bit value that, as the first part of an SPI token, allows any token to be
identified and located within a message.
token data type. The part of a token code that defines the kind of value (such as integer or
file name) allowed for the token.
token length. The part of a token code that indicates the length, in bytes, of the
corresponding token value. A token length of 255 indicates that the token value has
variable length or a length greater than 254; in this case, the first word of the token value
contains the (noninclusive) byte length of the rest of the token value.
token map. A structure that contains decoding information for an extensible structured token.
Also, a variable name used to refer to an extensible structured token. The token map
includes a token code and a description of the token value: its fields, the null values of
those fields, and the versions of the fields. A token map defines a structure that might
change in some later code version (by the addition of new fields at the end), and the
information in the map allows SPI to provide compatibility between different structure
versions.
token number. The number used by a subsystem to identify each SPI token it defines. The
token type and the token number together form the token code.
Token-Ring line. In SNAX/XF and SNAX/APN, a type of line object representing a
connection through TLAM to a Token-Ring network. SNAX/APN supports nonswitched
Token-Ring connections.
Token-Ring network. A ring topology that uses a token to control transmission.
token type. The part of a token code that identifies the data type and length of the token
value. The token type and the token number together form the token code.
token value. The value assigned to an SPI token.
trace. A record of the execution of a computer program or of data transmitted over a
specified interface.
UCB. Unit control block.
UCW. Unit control word.
unconditional token. A token that is always present in a particular event message. See also
conditional token
and Compaq internal token.
VTAM. Virtual telecommunications access method.
X.25. A CCITT recommendation for the interface between data terminal equipment and
packet switching networks; it is also referred to as Recommendation X.25.
X.25 line. A type of line object representing a connection through X25AM to an X.25
network.