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3

As a front-end developer, I'd make a custom control which shows just the symbol when collapsed and the symbol + text when expanded. This way both concerns (about space and symbol choice) turn less important, because when the dropdown is expanded, it's supposed that the intended action is just to make the selection so you don't care about it taking more or ...


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Usability is more important than accuracy At least, in most cases. While the ⊂ symbol may be compact and precise, it will be unfamiliar to many lay users so it may not be the most intuitive choice for your search. On the other hand, ff your users are technical, it may be a fantastic choice. Space may be at a premium, but unless you are designing for a ...


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While other answers have correctly pointed out the symbols for supersets and subsets, if you are ok with mathematical symbols, you might also consider ∊, where x ∊ Y means x is an element of Y. x ⊂ Y means x is a subset of Y, which is, strictly speaking, not exactly correct, as elements of sets have no particular order. Thus, for the expression "ee" ⊂ ...


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From a UX perspective most of those symbols are problematic with the exception of '='. I'd imagine your users are familiar with '>' or '<' for sure, but even that could be troublesome as some people might need more context. All those others indicating 'contains' etc are definitely not user friendly. If this is only ever going to be in a PC setting within ...


4

The mathematical symbol for "contains" is ⊃. For "starts with" and "ends with", the symbols ^ and $ are used in regular expressions. However, it is unlikely that your users are familiar with these symbols in this context. Use WILDCARDS instead. Most users recognize the use of asterisk * as a placeholder for unknown text during textual-search. This way, ...


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There is a mathematical symbol for expressing something like 'A has x' and it's the subset symbol: ⊇ and ⊆ or ⊂ and ⊃ (there is clearly some disagreement on how to use it consistent). I highly doubt this symbol is recognized by most users. Maybe use the word 'contains', or if space is really sparse, maybe use the word 'has'? Maybe these links are useful: ...



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