3 <isis type="swish|display|index"
5 format="one of formatting functions below"
7 >_pre_000x_sep_000x_sep_000x_post_</isis>
10 upper [from_char[,to_char]]
16 upper_w [word_nr[,...]
18 make words in field UPPERCASE
23 returns substring from some character in some length
24 default: len - rest of the string
27 skip all aphanumeric caracters and return just
28 numbers after it. To output "1992." from "cop. 1992."
30 initial [word_nr[,...]]
32 make word(s) into initials (upper case first char and
38 name of filter which is stored in filters/[name].pm