You can add filters, calculated values, Spotfire property controls etc in a Text Area. These controls should be considered as Spotfire objects which are translated into HTML when they are rendered. It is not recommended to rely on the rendered HTML for these controls as it may change in future versions of TIBCO Spotfire.
Changes between version 6.5 and 7.0 of TIBCO Spotfire
In TIBCO Spotfire Analyst 6.5, each Text Area and its corresponding scripts execute in its own separate browser window and has its own HTML DOM (Document Object Model). This is different from TIBCO Spotfire Web Player 6.5 where the complete analysis execute in one browser window.