In many libraries, such as the National Library of Spain, we can download data sets in various formats.
In the following we analyze what each of these formats is for and how to use them, especially the MARC and LOD formats.
Objective
The main objective of this task is to provide the largest number of data belonging to the corpus used in a project in the LOD format.
File formate
The type of output refers to the export format. For readers, the tagged format and ISBD are especially recommended
- Labeling: The selected records will appear with label display, that is, giving names to the fields: author, title, edition, subject….
- MARC 21: the file it generates presents the fields in MARC display, that is, with the fields: 001, 100, 245…. Each field in a separate paragraph, to improve readability.
- ISO 2709: converts the record to ISO 2709 format. This format encodes the record so that the Library Management Systems (LMS) can interpret it and integrate it into their database. Management Systems may not directly recognize the 2709 format. There are various software that help convert ISO 2709 into a more compressible format for SIGBs. Among them, a free one can be downloaded at: https://marcedit.reeset.net/
- MARCXML: The MARCXML format consists of the encoding of a MARC record in XML (eXtensible Markup Language). This format allows a variety of general purpose software and many web pages to import, view, etc. these records.
- ISBD: the ISBD standard (International Standard Bibliographic Description) establishes the rules for the standardized writing of bibliographic records, so that they are readable by people of different countries and languages, usually within the framework of a library catalog or a bibliography . The registry data is divided into 8 areas and is separated by various spelling signs. After sending one or more records in ISBD format by email, they are received in HTML code.
MARC
MARC (abbreviation from: MAchine-Readable Cataloging), is an international digital standard for the description of bibliographic information developed by the Library of Congress of the United States during the 1960s to facilitate the creation and dissemination of computerized cataloging from one library to another within from the same country or between several countries. In 1971, the MARC format became the national standard for the dissemination of bibliographic information; and in 1973, in international standard. Several versions of MARC are in use around the world, including: MARC 21, which is the most predominant, created in 1999 as a result of the harmonization of the MARC formats of the United States and Canada; and UNIMARC, widely used in Europe. Today, in the MARC 21 family of standards, there are formats for authority records, records of possession, classification calendars, and community information, in addition to formats for bibliographic records.
Related Bibliography:
LOD
Linked Open Data defines a vision of data linked and accessible worldwide on the Internet according to the RDF standards of the semantic web. LOD is often thought of as a virtual data cloud where anyone can access any data they are authorized to view and can also add to any data without disturbing the original data source. This provides an open environment where data can be created, connected, and consumed at the Internet scale. A basic theory of LOD is that data has more value if it can be connected to other data. Data, in this context, is any structured web-based information.
LOD has been proposed as the basis for open government and to solve many of the data integration problems.
RDF
RDF is a standard model for data exchange on the Web. RDF has features that make it easy to merge data even if the underlying schemas differ, and it specifically supports the evolution of schemas over time without requiring all data consumers to be modified.
RDF extends the link structure of the Web to use URIs to name the relationship between things, as well as the two ends of the link (this is generally referred to as "triple"). With this simple model, you can mix, expose and share structured and semi-structured data in different applications.
This link structure forms a directed and labeled graph, where the edges represent the named link between two resources, represented by the nodes of the graph. This graph view is the easiest possible mental model for RDF and is often used in easy-to-understand visual explanations.
Conversion
MARC Edit is capable of opening the file types listed below. Conversion between the file types listed below is also possible with the help of MARC Edit. You can find more information about this in the application manual.
Associated file types
Search/Retrieve via URL Response Format Data
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Tabea Hirzel
Saturday, January 23, 2021