266 |
|
|
267 |
For instance, consider a published scientific article |
For instance, consider a published scientific article |
268 |
available through several different URLs on the WWW, |
available through several different URLs on the WWW, |
269 |
e.g.,~through ResearchIndex\cite{XXX}, the ACM portal and |
e.g.,~through ResearchIndex\cite{giles98citeseer%,lawrence99digital |
270 |
the author's web site. |
}, |
271 |
|
the ACM portal and the author's web site. |
272 |
Now, when a user downloads and saves one copy, the relationship between |
Now, when a user downloads and saves one copy, the relationship between |
273 |
the local copy and the original on the WWW is severed, so |
the local copy and the original on the WWW is severed, so |
274 |
in the computer's opinion there are now {\em four} different entities, |
in the computer's opinion there are now {\em four} different entities, |