A bulk data input processor which is available for the Rapidly Extensible Language (REL) English versions is described. In REL English versions, statements that declare names of data items and their interrelationships normally are lines from a terminal or cards in a batch input stream. These statements provide a convenient means of declaring some names and stating some facts, and they are especially useful in the interactive mode. However, these statement formats are not convenient for inputting large data bases which are usually available on tapes or cards and which are generally formatted in terms of fixed fields. The bulk data input processor reads such formatted files and puts data into the version. Topics discussed in this report include: the input file format, the logical record, the physical record, field, class, relation, table, order of cards, treatment of blanks, error handling and variable record processing. Two appendixes provide a summary of descriptor cards and a series of examples illustrating how the system operates. (Author/LB)