Specifies the external file to load into the editing options for the current property.
If the FILE tag refers to Styles.sha, the software also examines ISSTYLES.sha for the required data. The software uses styles from these files when presenting objects such as lines, leaders, and dimensions in a drawing.
FILE exists as a child node under the EXTERNAL_SOURCE node:
<EXTERNAL_SOURCE>
<FILE>Styles.sha</FILE>