# Logical Operators ... Blank etc **URL:** https://community.mp3tag.de/t/logical-operators-blank-etc/60843 **Category:** Support **Created:** [April 30, 2023, 5:17am UTC](https://community.mp3tag.de/t/logical-operators-blank-etc/60843 "2023-04-30T05:17:32Z") **Posts on this page:** 1 **Showing post:** 4
### Author: ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino) #### Post date: [April 30, 2023, 6:06am UTC](https://community.mp3tag.de/t/logical-operators-blank-etc/60843/4 "2023-04-30T06:06:46Z")
19 days ago I asked you to have a look at the documentation for filters: > [@How to find/enter missing metatag values](https://community.mp3tag.de/t/how-to-find-enter-missing-metatag-values/60669/2): > > These files are usually corrupt or have an unsupported format. For more information about filters, see (really!) Here are suggestions on tools to check files for problems: but your responses show me that you did not. Also I think that you still circle around the idea that fields can be empty - which they cannot. If there is no data for a field, then the field cannot be found in the metadata. There is no table (or something similar) stored in the metadata that is reserved for a particular field. So "MISSING" described it absolutely correctly: the field is not there, it is not emtpy. Taken seriously, a test for an empty string in a field that is not there should really produce an error (which thankfully does not happen) As with many of your other posts you describe your problems very theoretically. It would be much nicer if you could tell us the real situations, preferably with a screendump. So: for which use-case do you need a test for the presence of data and the data type. > [@dec](#): > > that there are no such logical operators, such as 'isblank', etc? > (which really there should be) If you really need such operators but you > [@dec](#): > > do not want to have to learn to be a coder as well then I see a certain discrepancy as such operators are usually only used in codes, aren't they? --- _[View the full topic](https://community.mp3tag.de/t/logical-operators-blank-etc/60843)._