FILE_BASENAME: Return the basename of a file path.

FILE_DIRNAME: Return the dirname of a file path.

I18N_MULTIBYTETOUTF8: Convert multibyte to UTF8.

I18N_MULTIBYTETOWIDECHAR: Convert multibyte to UTF-16, wide-character (Unicode).

I18N_UTF8TOMULTIBYTE: Convert UTF-8 to multibyte .

I18N_WIDECHARTOMULTIBYTE: Convert UTF-16, wide-character (Unicode) to multibyte.

IDL_BASE64: Convert between byte arrays and MIME Base64 encoded scalar strings.

IDL_String: A collection of static methods that are available for all strings.

READS: Perform formatted input/output from a string variable.

STRCMP: Compare two strings.

STRCOMPRESS: Remove whitespace from a string.

STREGEX: Perform regular expression matching.

STRING: Convert arguments to string type.

STRJOIN: Collapse a string scalar or array into merged strings.

STRLEN: Return the length of a string.

STRLOWCASE: Convert a string to lower case.

STRMATCH: Compare search string against input string expression.

STRMID: Extract a substring from a string.

STRPOS: Find first occurrence of a substring within a string.

STRPUT: Insert the contents of one string into another.

STRSPLIT: Split its input string argument into separate substrings, according to the specified pattern.

STRTRIM: Remove leading and/or trailing blanks from string.

STRUPCASE: Convert a string to upper case.