the documentation gives examples of public UTIs.

https://doc.4d.com/4Dv17R5/4D/17-R5/Select-document.301-4127312.en.html
https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/understanding_utis/understand_utis_conc/understand_utis_conc.html

it seems like public UTIs work as expected:

e.g.

C_COLLECTION($UTIs)
$UTIs:=New collection("com.adobe.pdf";"public.jpeg")

ARRAY TEXT($files;0)

$file:=Select document(System folder(Desktop);$UTIs.join(";");"select";Multiple 
files;$files)

UTIs exported from info.plist (.4lbp falls into this category) are not public.

UTTypeDescription: 4D Label File
UTTypeIdentifier: com.4d.4d.labelFile
com.apple.ostype: 4DET
public.filename-extension: [4LB, 4LBP]

2019/06/25 9:17、jeff--- via 4D_Tech 
<[email protected]<mailto:[email protected]>>のメール:
The issue seems to be they also say to use UTIs on Mac, which don’t seem to 
work.  Only extensions work.



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