BS ISO 17316:2015 pdf download – Information and documentation — International standard link identifier (ISLI)
1 Scope
This International Standard specifies an identifier of links between entities (or their names) in the fieldof information and documentation.These entities can be documents, media resources, people, or moreabstract items such as times or places.
The lSLl system identifies links between entities that are related to each other so that, for instance,they can be rendered jointly. lt does this by registering each link identifier with information(metadata)that specifies the link. The ISLl does not change the content, ownership, right of access,or existingidentification of these entities.
This International Standard does not specify the technology used to represent the identifier or realize thelink. It enables applications to be built which use the interoperable lSLIsystem for the identification oflinks.
2Terms and definitions
For the purposes of this document, the following terms and definitions apply.2.1
entity
something capable of being uniquely identified
Note 1 to entry:Entities include material objects, electronic representations of content, abstract items (such astimes, places), parties (human and corporate),as well as anything else that can be identified uniquely.
Note 2 to entry: A defined fragment of an entity is itself an entity.
2.2
ISLI code
International Standard Link ldentifier assigned in accordance with the specifications of thisInternational Standard
2.3
link
directed relationship between two entities (2.1) in the field of information and documentation
2.4
name
string of characters that identifies an entity (2.1), possibly (but not necessarily) in the form of an identifier specified in an International Standard
2.5
registrant
party requesting the assignment of an ISLI code (2.2) to a link (2.3)
2.6
service
class of links (2.3) with a common application between typed sources (2.7) and typed targets (2.8)
2.7
source
entity (2.1) which is the origin of a link (2.3)
2.8
target
entity (2.1) which is the destination of a link (2.3)
3 Link model of ISLI
An ISLI code specifies the link between a source and a target as shown in Figure 1.
4 Structure and syntax of ISLI
An ISLI code, as shown in Table 1, comprises decimal digits in three fields, which includes
— service field,
— link field, and
— check digit field.
4.1 Service field
The service field contains the service code, which is allocated by the registration authority.
The service code comprises six decimal digits.
4.2 Link field
The link field contains the link code, which defines the link between the source and the target. It is assigned by the registration authority. The link code comprises decimal digits and its length is defined for each service by the registration authority.
4.3 Check digit field
The check digit provides protection against errors.
The check digit field contains a single decimal digit calculated from the contents of the service field and link field in accordance with Annex D.
4.4 ISLI representation for human reading
ISLl is a code intended for machine reading.When an ISLl code needs to be shown on a screen or printed,the hyphen symbol “.” should be added to separate the fields and “ISLI” should be inserted before thenumeric code.The symbol “” and”ISLI” do not form part of the identifier.
EXAMPLE ISLI116063-4520086293791473426443001-9
5Principles for allocation of ISLI
5.1Allocation of ISLI service codes
5.1.1 An ISLl service code shall be allocated to a service by the registration authority if an applicationmeets the criteria that the registration authority shall publish.
5.1.2 An ISLl service code shall be allocated to one service and each service shall be allocated only oneISLI service code.
5.1.3 An lSLl service code shall be permanently allocated to a given service and shall never be altered,replaced, or reused, although it may be withdrawn from use for new assignments of lSLI codes.
5.1.4 Details on the allocation of ISLl service codes are contained in A.1.
5.2Assignment of ISLl codes
5.2.1 An ISLl code shall be assigned by the registration authority on receipt of an application for a codeto be associated with a particular service.
5.2.2 An ISLl code shall not be assigned unless the registrant wishes to designate that the relevantsource and target are to be linked within the requested service.
5.2.3 Within a service, each lSLl code shall be assigned to only one link from a given source to a giventarget, and each such link shall be assigned only one ISLI code.
NOTE Provided two ISLlcodes are assigned in different services, they can refer to the same sourcesand targets.5.2.4 The ISLl shall identify a link rather than a single entity.
5.2.5 An lSLl code may be assigned to a link where the source and/or the target is an entity whosecontent changes over time, such as a webpage.