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# XSD Miscellaneous Data Types * * * Other miscellaneous data types include boolean, base64Binary, hexBinary, float, double, anyURI, anyURI, and NOTATION. * * * ## Boolean Data Type The boolean data type is used to specify true or false values. Here's an example of a logical declaration in a schema: The element in the document should look something like this: 999 **Note:** The valid boolean values are true, false, 1 (representing true), and 0 (representing false). * * * ## Binary Data Types Binary data types are used to represent data in binary form. We can use two binary data types: * base64Binary (binary data encoded in Base64) * hexBinary (binary data encoded in hexadecimal) Here's an example of a hexBinary declaration in a schema: * * * ## AnyURI Data Type The anyURI data type is used to specify URIs. Here's an example of an anyURI declaration in a schema: The element in the document should look something like this: **Note:** If a URI contains spaces, replace them with %20. * * * ## Miscellaneous Data Types | Name | Description | | --- | --- | | anyURI | | | base64Binary | | | boolean | | | double | | | float | | | hexBinary | | | NOTATION | | | QName | | * * * ## To