| String | A text string - for example : blue
Note that when a string type is selected, you can choose the regex operator and define a regex value. This provides greater flexibility if you can't achieve the desired results using standard operators. preg_match is used for pattern matching. For an example, see Using regex for string-type filters.
You can also match a string-type field according to whether or not the value is one of many items in a given list. For more information, see Using contains one of many or does not contain one of many for string filters.
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| String length | A number which represents the expected string length for the received payload. Here, the 'payload' might refer to a targeted field within the incoming payload or the entire payload.
For example, if you want to ensure that an objectId field is never empty, you would define a filter for objectId greater than 0:
In this case, toggling the keep matching option to OFF means that the ongoing payload will include only items where this field is not empty. Conversely, toggle this option on if you want to pass on empty payloads for any reason.
You can use the same principle to check for empty payloads (as opposed to a specific field). In this case you would define a filter for * greater than 0:
Note that a blank value is processed as a 0 value.
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| Number | A number - for example: 2 |
| Specific date | A day, month and year, selected from a date picker. |
| Dynamic date | Specify a date/time which is relative to a +/- number of units (seconds, minutes, hours, days, months, years). For example:
It's important to be aware that relative date/time variables are affected by the use queued at time process flow setting. |
| Boolean | A true or false value. For example, if you only want to consider items where an itemRef field is set to true, you would define a filter for itemRef equals true:
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| Null comparison | A field is null if it has no defined value. Choose whether the give data path is null or not null. For example:
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| Variable | Designed specifically for cases where you are comparing a variable value as the filter comparison. 
When selected, a value type field is displayed and the expected type for your variable can be selected. This ensures that a true comparison can be made. Note that if you are filtering on multiple variables, the value type field should be set to None. |
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