Example 1

Let's say that the file system (and thus the filtering engine) uses strings for the internal representation for the tags, and the operators which are defined are the following: {equal, start_with, end_with, match}. The file system contain tree files which all are pictures taken on an vacation in Singapore during the period 1/1-06 to 1/2-06, the tree files have the following tags: {Picture, Singapore, 1/1-06}, {Picture, Singapore, 2/1-06}, {Picture, Singapore, 30/1-06}. In this example it would not be possible to write a query for all pictures taken in the period from the 1/1-06 to the 10/1-06.