703 |
annotating and connecting |
annotating and connecting |
704 |
PDF files (for example, academic articles) obtained from other sources. |
PDF files (for example, academic articles) obtained from other sources. |
705 |
|
|
706 |
|
Our application combines two hypermedia structures: Xanalogical links |
707 |
|
between pieces of a PDF file [ted-xanalogical-structure-needed]_, |
708 |
|
and placement of PDF fragments and textual annotations on |
709 |
|
a 2-dimensional canvas [perlin93pad-andalso-bederson96padpp]_. |
710 |
|
Overlapping pieces of PDF files can be placed on more than one canvas, |
711 |
|
creating a visible *transclusion* [literary-machines-931]_. |
712 |
|
|
713 |
We take Cells a la Nelson's ZigZag[XXX ref] to be fundamental, point-like nodes |
We take Cells a la Nelson's ZigZag[XXX ref] to be fundamental, point-like nodes |
714 |
of the structure. A cell can have two types of relationships, as shown |
of the structure. A cell can have two types of relationships, as shown |
715 |
in Fig.[ref-xupdfStructure]: it is spatially placed onto a 2-dimensional |
in Fig.[ref-xupdfStructure]: it is spatially placed onto a 2-dimensional |