How to define expression for a data driven category

[markkums]

Hi there,

I found out an example category (Month created) in iMatch, but that is not practical as there is a tag expression which defines a creation date for each image. There would be huge number of child categories under this. In fact this does not work currently in my system at all (140k+ images in database).

Now, what would be feasible for me is ,like in timeline, categorizing in main level by creation year and on lower level by creation month. How to write expression for this in a data driven category (I know the process how to create a category, but how to dig "year" and "month" separately out from metadata?)

By having this in category (instead of using timeline) gives me the change to use builder for selecting files.

Best regards,
Markku

[jch2103]

See the Help section for Data-Driven Categories, specifically  the 'SubString Start and Length' discussion. You can set up the top level data-driven category, for example, to the sub-string 1,4 to capture the year for a date/time tag. Then just set up lower-level categories for month, etc.

Let us know if you need more information.

[markkums]

Hi jch2103,

Thanks for your advices. I got things running smoothly, great...

B.r: Markku