> ## Documentation Index > Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt > Use this file to discover all available pages before exploring further. # List of Supported MDX Operators by Atoti This table lists all existing MDX Operators functions and details their support level in Atoti. The following notations are used: | Symbol | Meaning | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------- | | tick | fully supported | | plus | partially supported | | minus | not supported | | cross | will not be supported | | Operator Name | Support | Documentation & Comments | | ----------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------- | | + (Add numbers) | tick | [MSDN + (Add) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/add-mdx) | | + (Positive numbers) | minus | [MSDN + (Positive) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/positive-mdx) | | / (Divide numbers) | tick | [MSDN Divide - MDX Operator Reference](https://docs.microsoft.com/en-us/sql/mdx/divide-mdx-operator-reference) | | \* (Multiply numbers) | tick | [MSDN \* (Multiply) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/multiply-mdx) | | - (Subtract numbers) | tick | [MSDN - (Subtract) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/subtract-mdx) | | - (Negative numbers) | tick | [MSDN - (Negative) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/negative-mdx) | | ^ (Power numbers) | tick | [MSDN ^ (Power) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/power-mdx) | | AND | plus | [AND and OR Operators (MDX)](#and-and-or-operators) | | IS | tick | [MSDN IS (MDX)](https://docs.microsoft.com/en-us/sql/mdx/is-mdx) | | NOT | tick | [MSDN NOT (MDX)](https://docs.microsoft.com/en-us/sql/mdx/not-mdx) | | OR | plus | [AND and OR Operators (MDX)](#and-and-or-operators) | | XOR | tick | [MSDN XOR (MDX)](https://docs.microsoft.com/en-us/sql/mdx/xor-mdx) | | : (Range) | tick | [MSDN : (Range) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/range-mdx) | | \< (Less Than) | tick | [MSDN \< (Less Than) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/less-than-mdx) | | \<= (Less Than or Equal To) | tick | [MSDN \<= (Less Than or Equal To) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/less-than-or-equal-to-mdx) | | \<> (Not Equal To) | tick | [MSDN \<> (Not Equal To) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/not-equal-to-mdx) | | = (Equal To) | tick | [MSDN = (Equal To) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/equal-to-mdx) | | > (Greater Than) | tick | [MSDN > (Greater Than) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/greater-than-mdx) | | >= (Greater Than or Equal To) | tick | [MSDN >= (Greater Than or Equal To (MDX)](https://docs.microsoft.com/en-us/sql/mdx/greater-than-or-equal-to-mdx) | | - (Except sets) | tick | [MSDN Except (MDX) Operator](https://docs.microsoft.com/en-us/sql/mdx/except-mdx-operator) | | + (Union sets) | tick | [MSDN Union - MDX operator reference](https://docs.microsoft.com/en-us/sql/mdx/union-mdx-operator-reference) | | \* (Crossjoin sets) | tick | [MSDN Crossjoin - MDX Operator Reference](https://docs.microsoft.com/en-us/sql/mdx/crossjoin-mdx-operator-reference) | | + (Concatenate strings) | tick | [MSDN + (String Concatenation) (MDX)](https://docs.microsoft.com/en-us/sql/mdx/string-concatenation-mdx) | ### And and Or Operators The `AND` and `OR` operators follow the MSDN specification ([AND](https://docs.microsoft.com/en-us/sql/mdx/and-mdx), [OR](https://docs.microsoft.com/en-us/sql/mdx/or-mdx)), with one difference: the arguments are lazily evaluated. For example when doing `arg1 AND arg2`, if `arg1` evaluates to `false`, `arg2` won't be evaluated. Similarly, for the expression `arg1 OR arg2`, if `arg1` evaluates to `true`, `arg2` won't be evaluated.