XSLT- String formatting

Hi,
I am using xsl to read a xml and produce a text format output.
Is there any way so that i can format the strings ( such as  printf in 'C' language
does)
e.g there is a element of name employer.
in output i want all the values of that element be left aligned, and 20 characters
long.
in 'C' i might do printf("-%20s", employer);
is there any option to the xsl:value of tag or is there any other way i can do this.
I would appreciate ur answers
Thanks,
Vivek



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