In the form, I am asking the person to record the hue, value and chroma of the soil they are looking at. Based on their input, I have a text read only field that will display the soil color name. For example if the hue is Gley 1 the color will be white so in the relevant field I have ${hue}='gley1' . I need to do something more complex that requires regex but not sure of the syntax. Would it be ${hue}=regex([A-Z]\w) or regex(${hue},"[A-Z]\w")?
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