The QBank filter function is as powerful as the search, this article describes the logic behind it and gives you tips on how you can use filters when searching for media
How do you choose the correct search criteria?
Example: A search for the values RED and BLUE:
Contains: (This option is only relevant for a search that can be seen as a whole, such as a link or a description text. The search generates no tag.) You get hits on what you searched for, even in the field contains more information as well. Searching on the text "www.RED.se" gives hits both on "www.RED.se" and "www.RED.se/mediabank".
Contains any: (This option is only relevant when searching for more than one value in property fields with pre-defined values.) If you search for two or more different keywords, you will get hits on all files containing any of these values in the property field, ie the files containing only RED or BLUE only, or both RED and BLUE.
Does not contain:(This option is only relevant when searching for more than one value in property fields with pre-defined values.) You get hits on all files that contain other information in the relevant field than any of the values you entered. You will find all files that lack the keyword RED or BLUE in the property field.
Contains all: (This option is only relevant when searching for more than one value in property fields with pre-defined values.) You get hits containing all the values you have written but also those that contains additional values. Such as those that contains the values RED and BLUE but also the value BLACK.
Is: You will get hits on exactly what you entered no matter how many words. The spelling must be correct and the search is different between uppercase and lowercase. You get hits on files containing RED and BLUE, but not files that only contains RED OR BLUE (but not lowercase red or blue).
Is not: You get hits on all files that does not contain exactly the information in the relevant field than the values you entered. You sort out exactly those opposite files of those you get with the search criteria "Is". You will get a hit on all files that do not have the keyword RED and BLUE somewhere in the property field. You will get a hit on files that contains RED or BLUE only.
Has a value: This option is used to find all files that has any information, any, in the relevant property field.
Has no value: This option is used to find all files which totally lacks value in the relevant property field. Excellent to use in order to find files you missed to notice.