The smart group of Endnote X6 can recognize the keywords I set, and include certain pdf file when I add annotations to the pdf file with adobe acrobat. However, if I remove the annotation from the pdf file, the smart group still contains the reference. Please fix this problem.
I come up with two proper ways to fix this problem
1.Re-index all the pdf files per 5 minutes or let user manually re-index them using a button
2.Monitor pdf file changes like dropbox, re-index inmmediately after each change