We present our ongoing work on extending IIIF to curation and timeline applications that are relevant in cultural heritage, humanities, and natural sciences. Our focus is in keeping the current structure of IIIF Presentation API as much as possible, while filling missing parts in the current specification by adding new nodes and links. Our latest development is accessible at http://codh.rois.ac.jp/software/iiif-curation-viewer/ and http://agora.ex.nii.ac.jp/digital-typhoon/himawari-3g/clipping/.