The .pd file extension is used for a database file format, which was created by Corel Corporation for their Paradox software. These PD files are also known as Corel Paradox table files and are generated by the Paradox program, which is a relational database management application that was developed by Corel Corporation for Windows PCs. This software is bundled with WordPerfect Office, which is a suite of tools that was also created by Corel Corporation.These PD files contain table data that has been generated using the Corel Paradox software and are encoded in plain text format. These .pd files may also store layout attributes and text formatting properties that have been saved with the table data using the Corel Paradox program. These PD files also contain metadata details that are associated to the database project in Corel Paradox.A .pd file may be opened and viewed using the Corel Paradox software. Since these PD files are encoded in plain text format, standard text editors like Notepad may also be used in some instances to open and view the data in these PD files. However, only Corel Paradox is recommended to be used for editing the content of these .pd files.
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