i'm not sure if i understand what you mean , i'm a begginer here.. but for example in katakana that symbols are more simple is there some explaination for the lines?
When you say that they are more simple like compared to hiragana or compared to other katakana characters? If you're asking for more of the etymology of katakana this link may help: http://www.omniglot.com/writing/japanese_katakana.htm