Best practice / design pattern for a vcard/mecard parser?

I have implemented a VCARD parser in objective c. Now I want to add support for the MECARD standard. The only difference of a VCARD and a MECARD are the different 开发者_开发知识库separators between the fields. Now I'm looking for a good design pattern that helps me to combine both standards into one parser.

Are there any best practices or design patterns for such text parsers?

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If your main difference is the separator, abstract it out by creating a parse function that takes your raw input and converts it into an array or some other data structure that does not need separators.