What is MARC? Discuss the field „856‟ for description of online resources
Field 856 in the
A description of the full field is available in the MARC
21 Concise Format for Bibliographic Data, or
in the full format, MARC 21 Format for Bibliographic Data, available from
LC's (CDS).
It is also available in the MARC 21 authority, holdings, classification and
community information format documentation.
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What is MARC? Discuss the field „856‟ for description of online resources
Presentation
Field 856 in the MARC 21 bibliographic, possessions,
authority, order, and local area data designs is utilized for electronic area
and access data to an electronic asset.
The field might be utilized in a bibliographic or property
record for an asset when it or a subset of it is accessible electronically.
Likewise, it could be utilized to find and access an electronic rendition of a
non-electronic asset depicted in either the bibliographic record, a piece of
the asset portrayed, or a connected electronic asset. See the Field 856 in
Different Configurations segment for data about how field 856 is utilized in
the power, order, and local area data designs.
General Data
The information in field 856 might be a Uniform Asset
Identifier (URI), which is kept in subfield $u. The fundamental finder data may
likewise be parsed into isolated characterized subfields. Note that different
subfields for finder information was given when this field was first settled in
1993, however by and large, these are only occasionally utilized. An entrance
strategy, or convention utilized, is given as a worth in the principal marker position
(in the event that the entrance technique is email, FTP, remote login (telnet),
dial-up, or HTTP) or in subfield $2 (in the event that the entrance technique
is anything more). The entrance technique is the main component of a URL. The
field may likewise incorporate a Uniform Asset Name or URN (e.g., a DOI
(Computerized Item Identifier) or handle).
See underneath for rules on repeatability.
What is MARC? Discuss the field „856‟ for description of
online resources
Uniform Asset Identifier. For any entrance strategy, a
Uniform Asset Identifier (URI) is for the most part kept in subfield $u.
Separate subfields might be utilized on the off chance that showing information
with a certain goal in mind is alluring.
The most regularly involved information components in field 856 are as per the following:
- first pointer = 4 for HTTP (prior records might utilize clear)
- Subfield $u = [HTTP URL]
- Subfield $3: information determining to what the URI alludes, if relevant
- Subfield $z (Public note): information connecting with the electronic area of the source that is satisfactory out there in the open
Required subfields. A URI in subfield $u is required except
if electronic area and access data is parsed into discrete subfields, in which
case no single subfield is required. While utilizing this strategy, the
subfields utilized generally relies upon the entrance technique showed in the
principal marker or in subfield $2 (if first pointer = 7).
Encoding non-MARC characters. In February 1994, Proposition
93-10 characterized extra characters in the MARC character set to both oblige
existing bibliographic necessities and to adjust it to the ASCII and ANSEL
character sets. Both the dividing highlight and the dispersing tilde were added
at the time in light of the need in registry and document names for electronic
assets. Numerous frameworks have executed these characters. For frameworks that
poor person executed the separating highlight and tilde, the accompanying
elective characters might be utilized:
- separating highlight %5F
- separating tilde %7E
What is MARC? Discuss the field „856‟ for description of
online resources
Since these characters are legitimate ASCII strings, the
above technique takes into consideration the usefulness upheld by Z39.50
clients and Internet browsers which grant clients to tap on connections to get
to assets addressed by URLs. At the point when the increments to the MARC 21
person set are carried out to help the encoding of the dispersing characters,
it will be feasible to supplant all examples of the %xx strings.
Various 856 fields. There are many motivations to remember
various 856 fields for records. Coming up next are the most widely recognized:
Area information components change (the URI in subfield $u or
subfields $a, $b, $d, when utilized)
Different access strategies (e.g., a record accessible
through HTTP and from a FTP server)
Various pieces of the thing are electronic, utilizing
subfield $3 to demonstrate the part (e.g., chapter by chapter guide open in one
document and a theoretical in another)
Reflect destinations (a similar asset is made accessible at
two unique areas, frequently to work with access, maybe globally)
Various arrangements/goals (e.g., the ASCII rendition of an
electronic diary versus the Internet landing page for that diary; a thumbnail
versus chronicled duplicate of a digitized photo)
Related things, utilizing subfield $3 and second marker worth
to indicate
See additionally under subfield $u for repeatability rules.
What is MARC? Discuss the field „856‟ for description of
online resources
Field 856 in bibliographic or possessions records. Since
field 856 is legitimate in both bibliographic and possessions records,
organizations might lean toward keep it in the property record. It is planned
to be an electronic comparable to field 852 (Area), which contains data used to
distinguish the holding association and other definite data expected to find an
actual thing in an assortment. In mid 1999, the Organization Improvement and
MARC Norms Office evoked suppositions on whether it is alluring to utilize the
field in bibliographic or property records. Reactions got commonly preferred
keep the field in the property record where viable. Nonetheless, for different
reasons, for example, the more extensive trade of bibliographic records,
numerous foundations utilize the bibliographic record regardless of the
advantages of utilizing possessions records.
The accompanying benefits of utilizing property records have been communicated:
Possession to an electronic asset might fluctuate by
organization. Such access data has a place in neighborhood possessions.
The possessions record is a way to unite different forms.
.jpg "information processing examples")
Having a hot-connected 856 field in property powers clients
to consider it possessions data, and to isolate data about the general
bibliographic thing.
The "widespread URL" that is for general access and
any broad data on access in note fields ought to be in the bibliographic
record. Explicit nearby access URLs ought to be in property (albeit this might
bring about unusualness).
Bibliographic field 856 could conveniently be restricted to
joins that don't make a difference to the whole bibliographic thing (e.g.,
tracking down help, chapter by chapter guide, unique).
To move towards this methodology later on, it will be
important to convince merchants to roll out the accompanying improvements to
their ILS frameworks:
- Take into consideration hot connections from property records
- Take into account the capacity to do interface checking from property records
- Give ordering of property records
- Consider the capacity to trade the fields from property, to be traded either as discrete possessions records or implanted in a sent out bibliographic record
- Accommodate more intelligent presentations of bibliographic/property data where vital
- Consider sequencing numerous possessions records
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