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Subject access refers to the methods and systems by which books, journals, and other documents are accessed in a given bibliographic database (e.g. a library classification system). The single records in a bibliographic file are structured in fields and each field can be searchable and combined with other fields.
The import and export of data is the automated or semi-automated input and output of data sets between different software applications.It involves "translating" from the format used in one application into that used by another, where such translation is accomplished automatically via machine processes, such as transcoding, data transformation, and others.
Various plots of the multivariate data set Iris flower data set introduced by Ronald Fisher (1936). [1]A data set (or dataset) is a collection of data.In the case of tabular data, a data set corresponds to one or more database tables, where every column of a table represents a particular variable, and each row corresponds to a given record of the data set in question.
A flat-file database is a database stored in a file called a flat file. Records follow a uniform format, and there are no structures for indexing or recognizing relationships between records. The file is simple. A flat file can be a plain text file (e.g. csv, txt or tsv), or a binary file. Relationships can be inferred from the data in the ...
A CSV file stores tabular data (numbers and text) in plain text, where each line of the file typically represents one data record. Each record consists of the same number of fields, and these are separated by commas in the CSV file. If the field delimiter itself may appear within a field, fields can be surrounded with quotation marks. [1]
Returns the value of the cell(s) in one or more output columns of the row matching the search key and column. This function is reminiscent of LOOKUP() macros in popular spreadsheet applications, except that the search key must match exactly.
An index table, also called the cross-reference table, is located near the end of the file and gives the byte offset of each indirect object from the start of the file. [25] This design allows for efficient random access to the objects in the file, and also allows for small changes to be made without rewriting the entire file ( incremental ...
Hierarchical Data Format (HDF) is a set of file formats (HDF4, HDF5) designed to store and organize large amounts of data.Originally developed at the U.S. National Center for Supercomputing Applications, it is supported by The HDF Group, a non-profit corporation whose mission is to ensure continued development of HDF5 technologies and the continued accessibility of data stored in HDF.