On 15 Jan 2011, at 21:11, Andreas Delmelle wrote:
> IDTracker keeps a Map of idLocations. Currently, this is a Map<String, 
> List<PageViewport>>, which, IIC, means that the IDTracker now keeps a hard 
> reference to all PageViewports in the document (associated with the fo:root 
> id), regardless of whether the page-sequence is finished or not.
<snip />

... and just noticed that this is intended, regardless of the fo:root id 
reference. At least, PageViewport's javadoc state that it is "valid for the 
life of the document and the area tree".

Sorry for the noise.

Regards,

Andreas
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