Test basic correct viewer handling of 'para' APS and associated attributes.

At the start of the test, the right-hand frame should display a CGM containing a simple picture with a "paragraph" of blue text and a second "paragraph" of green text. Each paragraph is actually four individual restricted text elements, enclosed in an APS of type 'para'.

The blue paragraph's 'para' contains no APS attributes except for a single 'linkuri' to another local CGM instance. The green paragraph's 'para' contains the same 'linkuri', and also an instance of each legal 'para' APS attribute. In particular, it contains a 'region' as indicated by the dashed drawn rectangle, and a 'viewcontext' as indicated by the dotted drawn rectangle. The 'linkuri' instances both have null values for their 2nd (Link Title) and 3rd (Behavior) parameters.

To execute the hyperlink from the blue 'para', move the mouse over the displayed text and click. The hyperlink should only be activated by clicking within the extent of a text string. The hyperlink from the green 'para' should be executed by clicking anywhere within the rectangle corresponding to the 'region' attribute. In both cases, the CGM instance in the right-hand frame should be replaced by the target CGM instance, containing three simple colored shapes. The object labelled "second object" should be highlighted in some way. The method of highlighting is viewer dependent.

The initial view in the left-hand frame is a PNG reference image of the target PNG image which should appear in the right-hand frame upon activating either link in the WebCGM source instance. There should be no significant visual deviation between the reference image of the left frame and the view in the right frame after link activation, except for the method of object highlighting. The reference image shows one valid method -- the border is outlined in red. Any other visual highlighting method -- e.g., changing the color of the whole object -- would be equally acceptable.

You should be able to use the browser "Back" and "Forward" buttons to go back and forth between the target WebCGM picture the source HTML text in the right-hand frame. Note, however, that this latter normal browser behavior is not part of the WebCGM standard, and it is not a pass/fail criterion for WebCGM viewers for this test. If it doesn't work, use "Reload" or "Refresh" between link executions, or go the table of contents and back.