As per Relevance of the word identification, we have this rfc below:
Network Working Group
Request for Comments: 982 April 1986
Guidelines for the Specification of the Structure of
Domain Specific Part (DSP) of the ISO Standard NSAP
ANSI Working Document X3S3.3/85-258
Status of This
The following is a RFC edition of the ANSI "Guidelines for
Specification of the Structure of the Domain Specific Part (DSP)
the ISO Standard NSAP Address". It should be understood that
ANSI working document is in a draft state and subject to change
These Guidelines are an important prerequirement to allow
addressing within the ISO connectionless protocol (CLNS),
itself is necessary to allow the coexistance of the IP and the
in the Arpanet attached gateways
A RFC to specify a suitable IP addressing method for ISOgrams
currently worked on in Internet Task Forces and should be expected
an RFC shortly
This RFC is for informational purposes only and it's
is unlimited. It does not specify a standard for the Arpa-Internet
Hans-Werner Braun (HWB@GW.UMICH.EDU
University of
ANSI [Page 1]
RFC 982 April 1986
ANSI
TITLE: GUIDELINES FOR THE SPECIFICATION OF THE STRUCTURE OF
DOMAIN SPECIFIC PART (DSP) OF THE ISO STANDARD NSAP
STATUS: X3S3.3 WORKING
There is a substantial amount of interest in providing guidance
private address administration authorities on preferred formats
semantics for the Domain Specific Part (DSP) of an NSAP address.
particular it is felt that use of a limited number of preferred
formats would allow organizations to easily use intermediate and
systems from a variety of suppliers. This technical report
the way in which the DSP may be constructed so as to
efficient address assignment
1. Scope and Field of
This Technical Report specifies a recommended syntax
interpretation for the Domain Specific Part of an NSAP address.
Address Administration Authorities are urged to use this format
the equipment comprising an addressing domain is of a
nature
2.
ISO 6523 Data Interchange - Structure for
identification of
ISO 7498 Information Processing Systems - Open
Interconnection - Basic Reference
ISO 8348 Information Processing Systems -
Communications - Network Service
ISO DIS 8348/DAD2 Information Processing Systems -
Communications - Addendum to the
Service Definition Covering Network
ISO DIS 8802 Information Processing Systems -
Communications - Local Area
ECMA TR/20 Layer 4 to 1
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RFC 982 April 1986
ANSI
3.
(This section to be suppled
4.
(This section to be supplied
5. Addressing
This section provides a summary of the major points contained in
8348/DAD2, as they are relevant to this technical report
Network addresses are defined to be hierarchical. An authority
either assign a complete address, or else may identify a subdomain
its own addressing domain within which addresses may be
assigned by an identified authority for the subdomain. This is
in such a way that all addresses are unique
When an authority identifies a subdomain, this creates in effect
prefix which applies to all addresses assigned within the subdomain
Certain methods of assigning authority are recognized within the
of DIS 8348/DAD 2. These take account of existing
standards such as X.121. The abstract structure of an address
shown in Figure 1.
ANSI [Page 3]
RFC 982 April 1986
ANSI
+---------------------------+---------------------------+
I I
I I D P I D S P
I I
+---------------------------+---------------------------+
: :
: :
V
+-----+---------------------+
I I
I AFI I I D I
I I
+-----+---------------------+
Figure 1: NSAP Address
The components of this structure are as follows
IDP: Initial Domain
This is the part of the address whose entire content
standardized. It consists of two parts, the AFI and the IDI
AFI: Authority and Format
This specifies the format of the IDI, the authority
for allocating IDI values, and the syntax of the DSP
IDI: Initial Domain
This identifies the subdomain from which DSP values are allocated
and the authority responsible for allocating the values
DSP: Domain Specific
The contents and semantics of the DSP are not specified in
8348/DAD2. Its abstract syntax is however defined by the AFI.
most cases, this means that the DSP abstract syntax can be
binary or decimal
IDI formats specified in DIS 8348/DAD2 identify a number
authorities for IDI allocation. These are
1. X.121 (Public data network numbering
2. F.69 (Telex numbering
ANSI [Page 4]
RFC 982 April 1986
ANSI
3. E.163 (Telephone numbering
4. E.164 (ISDN numbering
5. ISO DCC (Geographical address assignment under ISO authority
A subset of the DCC values used in X.121 have been used
designate the national addressing authorities
6. ISO 6523-ICD (Non-geographic address assignment under
authority, using the International Code Designators
to ISO 6523)
7. Local (the IDI is null and the entire address is contained
the DSP).
6.
(This section to be supplied
7.
7.1 X.121 DSP format
Description of Binary
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. If DSP is present, a DSP of 2 or less octets is an
selector. A DSP between 3 and 9 octets is interpreted in
manner described below
The length of the subnetwork identification is fixed at
octets (16 bits). The assignment of
identifications is under the control of the
authority for the private domain, except that the value
both octets hex "FF" is reserved to indicate that
subnetwork is not explicitly identified
The length of the subnetwork address may be up to six octets
and is determined by the DSP length minus three octets.
subnetworks using DIS 8802 MAC addressing, this field
of the octets of the MAC address in the same order as they
defined in DIS 8802.
The NSAP selector occupies a single octet
ANSI [Page 5]
RFC 982 April 1986
ANSI
Description of Decimal
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. If DSP is present, a DSP of 8 or less decimal digits
an NSAP selector. A DSP between 8 and 23 decimal digits
interpreted in the manner described below
The length of the subnetwork identification is fixed at
decimal digits. The assignment of subnetwork
is under the control of the administering authority for
private domain, except that a value of "99999" is reserved
indicate that the subnetwork is not explicitly identified
The length of the subnetwork address may be up to
decimal digits, and is determined by the DSP length minus
decimal digits
The NSAP selector occupies three decimal digits
7.2 ISO DCC DSP format
Description of Binary
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. The length of the DSP is between 6 and 12 octets
The first three octets identify an organization which has
designated as an addressing authority. This authority
responsible for assigning values to the remainder of the DSP
The length of the subnetwork identification is fixed at
octets (16 bits). The assignment of subnetwork
is under the control of the administering authority for
private domain, except that the value with both octets hex "FF
is reserved to indicate that the subnetwork is not
identified
The length of the subnetwork address may be up to six octets
and is determined by the DSP length minus three octets.
subnetworks using DIS 8802 MAC addressing, this field
of the octets of the MAC address in the same order as they
defined in DIS 8802.
The NSAP selector occupies a single octet
ANSI [Page 6]
RFC 982 April 1986
ANSI
Description of Decimal
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. The length of the DSP is between 14 and 29
digits
The first six digits identify an organization which as
designated as an addressing authority. This authority
responsible for assigning values to the remainder of the DSP
The length of the subnetwork identification is fixed at
decimal digits. The assignment of subnetwork
is under the control of the administering authority for
private domain, except that a value of "99999" is reserved
indicate that the subnetwork is not explicitly identified
The length of the subnetwork address may be up to
decimal digits, and is determined by the DSP length minus
decimal digits
The NSAP selector occupies three decimal digits
7.3 F.69 DSP format
Description of Binary
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. If DSP is present, a DSP of 2 or less octets is an
selector. A DSP between 3 and 9 octets is interpreted in
manner described below. Interpretation of a DSP greater than 9
octets in length is not specified in this report
The length of the subnetwork identification is fixed at
octets (16 bits). The assignment of subnetwork
is under the control of the administering authority for
private domain, except that the value with both octets hex "FF
is reserved to indicate that the subnetwork is not
identified
The length of the subnetwork address may be up to six octets
and is determined by the DSP length minus three octets.
subnetworks using DIS 8802 MAC addressing, this field
of the octets of the MAC address in the same order as they
defined in DIS 8802.
ANSI [Page 7]
RFC 982 April 1986
ANSI
The NSAP selector occupies a single octet
Description of Decimal
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. If DSP is present, a DSP of 8 or less decimal digits
an NSAP selector. A DSP between 8 and 23 decimal digits
interpreted in the manner described below. Interpretation of
DSP greater than 23 decimal digits in length is not
in this report
The length of the subnetwork identification is fixed at
decimal digits. The assignment of subnetwork
is under the control of the administering authority for
private domain, except that a value of "99999" is reserved
indicate that the subnetwork is not explicitly identified
The length of the subnetwork address may be up to
decimal digits, and is determined by the DSP length
eight decimal digits
The NSAP selector occupies three decimal digits
7.4 E.163 DSP format
Description of Binary
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. If DSP is present, a DSP of 2 or less octets is an
selector. A DSP between 3 and 9 octets is interpreted in
manner described below. Interpretation of a DSP greater than 9
octets in length is not specified in this report
The length of the subnetwork identification is fixed at
octets (16 bits). The assignment of subnetwork
is under the control of the administering authority for
private domain, except that the value with both octets hex "FF
is reserved to indicate that the subnetwork is not
identified
The length of the subnetwork address may be up to six octets
and is determined by the DSP length minus three octets.
subnetworks using DIS 8802 MAC addressing, this field
of the octets of the MAC address in the same order as they
defined in DIS 8802.
ANSI [Page 8]
RFC 982 April 1986
ANSI
The NSAP selector occupies a single octet
Description of Decimal
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. If DSP is present, a DSP of 8 or less decimal digits
an NSAP selector. A DSP between 8 and 23 decimal digits
interpreted in the manner described below. Interpretation of
DSP greater than 23 decimal digits in length is not
in this report
The length of the subnetwork identification is fixed at
decimal digits. The assignment of subnetwork
is under the control of the administering authority for
private domain, except that a value of "99999" is reserved
indicate that the subnetwork is not explicitly identified
The length of the subnetwork address may be up to
decimal digits, and is determined by the DSP length minus
decimal digits
The NSAP selector occupies three decimal digits
7.5 E.164 DSP format
Description of Binary
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. If DSP is present, a DSP of 2 or less octets is an
selector. A DSP between 3 and 9 octets is interpreted in
manner described below. Interpretation of a DSP greater than 9
octets in length is not specified in this report
The length of the subnetwork identification is fixed at
octets (16 bits). The assignment of subnetwork
is under the control of the administering authority for
private domain, except that the value with both octets hex "FF
is reserved to indicate that the subnetwork is not
identified
The length of the subnetwork address may be up to six octets
and is determined by the DSP length minus three octets.
subnetworks using DIS 8802 MAC addressing, this field
of the octets of the MAC address in the same order as they
defined in DIS 8802.
ANSI [Page 9]
RFC 982 April 1986
ANSI
The NSAP selector occupies a single octet
Description of Decimal
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. If DSP is present, a DSP of 8 or less decimal digits
an NSAP selector. A DSP between 8 and 23 decimal digits
interpreted in the manner described below. Interpretation of
DSP greater than 23 decimal digits in length is not
in this report
The length of the subnetwork identification is fixed at
decimal digits. The assignment of subnetwork
is under the control of the administering authority for
private domain, except that a value of "99999" is reserved
indicate that the subnetwork is not explicitly identified
The length of the subnetwork address may be up to
decimal digits, and is determined by the DSP length minus
decimal digits
The NSAP selector occupies three decimal digits
7.6 ISO 6523-ICD DSP format
Description of Binary
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. The length of the DSP is between 5 and 11 octets
The first two octets identify an organization which has
designated as an addressing authority. This authority
responsible for assigning values to the remainder of the DSP
The length of the subnetwork identification is fixed at
octets (16 bits). The assignment of subnetwork
is under the control of the administering authority for
private domain, except that the value with both octets hex "FF
is reserved to indicate that the subnetwork is not
identified
The length of the subnetwork address may be up to six octets
and is determined by the DSP length minus three octets.
ANSI [Page 10]
RFC 982 April 1986
ANSI
subnetworks using DIS 8802 MAC addressing, this field
of the octets of the MAC address in the same order as they
defined in DIS 8802.
The NSAP selector occupies a single octet
Description of Decimal
The length of the DSP can be determined since the total
length is known, and the IDP has fixed length for any given
value. The length of the DSP is between 12 and 27
digits
The first four digits identify an organization which has
designated as an addressing authority. This authority
responsible for assigning values to the remainder of the DSP
The length of the subnetwork identification is fixed at
decimal digits. The assignment of subnetwork
is under the control of the administering authority for
private domain, except that a value of "99999" is reserved
indicate that the subnetwork is not explicitly identified
The length of the subnetwork address may be up to
decimal digits, and is determined by the DSP length minus
decimal digits
The NSAP selector occupies three decimal digits
7.7 Local DSP format
No recommendations made
ANSI [Page 11]
if you see any problems within the linking, don't worry be happy,
this is version 0.1 of the Relevance System and you gotta expect some crappy subroutines sometimes,
just be content we did not write this in Java, which would have made this "bigger and better" HAHAHHA.
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