how to deal with the invisible character in my turtle file

[Pengjun Xie]

hi,all

    

     i am trying to import a turtle file into my 4store database. but some triples of my file contain space or some invisible character.

     when exec "4s-import",some error occurs:"aptor error - syntax error at '<'" .

   

     anyone knows how to deal with this problem?should I replace  the character with other character?

     thanks for your advice