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In this century , Vaslav Nijinsky devised a notation system about which little is known , although Ann Hutchinson Guest and Claudia Jeschke were able to use it reconstruct Nijinski 's Afternoon of a Faun . The good thing is it 's trivial to run big collections of PDFs through the optimization process - - both Acrobat and our Nitro PDF Professional do it . Adobe may not have directly threatened a lawsuit over Microsoft 's inclusion of PDF creation functionality with the pending version of Office , but it is clearly unhappy with the feature . Firmer shanks often help prevent a dancer from " going over " too far ; this can overstretch the ankle and hinder correct placement . Playing a dominant role in the curriculum will be the PDF University , facilitated by industry experts Stephan Jaeggi and David Zwang .