Hierarchical Data Format, commonly abbreviated HDF or HDF4, is a library and multi-object file format for the transfer of graphical and numerical data between computers created and maintained by the NCSA. The freely available HDF distribution consists of the library, command-line utilities, test suite source, Java interface, and the Java-based HDF Viewer (HDFView).

HDF supports several different data models, including multidimensional arrays, raster images, and tables. Each defines a specific aggregate data type and provides an API for reading, writing, and organising the data and metadata. New data models can be added by the HDF developers or users.

HDF is self-describing, allowing an application to interpret the structure and contents of a file without any outside information.

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NPR Topics: Technology

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