On Jan 11, 2009, at 6:23 PM, Robert Covington wrote: > Is that the only way now? Hi RC, Apple has tried to fix the multiple methods that can be used to identify files by creating Uniform Type Identifiers ( UTIs). There is a very short explanation and introduction in the Apple doc titled "Uniform Type Identifiers Overview". It is available in Xcode docs and also at Apple's developer web site. ( ADC Home > Reference Library > Guides > Carbon > Data Management > Uniform Type Identifiers Overview>). Apple's "Navigation Services Programming Guide" also contains good information for using UTIs with Nav Services but I would read the overview first. Brian S.