Keyword Descriptors

Keyword descriptors, introduced in the previous section, add the final refinement to the level 1 keyword. These descriptors can be characters (c), integer numbers (i), or real numbers (r), depending on the entry format. All numerical data is assumed to utilize MKSA units. Data are entered with a maximum length of 128 characters per record. For records containing numerical descriptors only (no character descriptors), blank spaces, commas, or tabs can be used as delimiters.