New function: xs.property(n,v) - which gets property values from node strings
New functions: file(fn:z), - which opens a file in a specified data zone f.open(p) - which opens a composite table file
New function: try -which tries to continue with the execution of a code block
New option: @g option for cs.groupx()function and cs.sortx() function; it enables to segment a cursor and then perform grouping and sorting over each gorup
New option: @a option for f.xlsexport()function and xo.xlsexport() function; it enables to an append according to the current format when the target file exists
New option: @a option for T.append() function; it enables a merge-style append of the cursor records to a patch file
New option: @x option for invoke() function; it converts a sequence type parameter or return value when the function calls a static function
New option: @t option for A.group()function, A.groups() function and A.select() function; it returns an empty table sequence with data structure when the original table sequence is empty
