Use the dsFields JSP tag within a dsDataSource tag, part of an autoComplete JSP tag configuration. This tag has no attributes. It can contain only dsField tags.
Example:
<pega:dsFields><pega:dsField name="pyStreamName" /><pega:dsField name="pyLabel" /></pega:dsFields>
The standard control AutoComplete incorporates an autoComplete JSP tag, and allows you to set most attributes of the autoComplete and acDataSource JSP tags as parameters. Enter an autoComplete JSP tag into hand-crafted HTML code only in special situations where the standard control does not meet your needs.