OK Phil,
When I write the publisher tag with my application, the result of the command-line "exiftool -a -G1 -s test1.pdf is :
---- ExifTool ----
ExifToolVersion : 10.11
Warning : [Minor] Ignored duplicate Info dictionary
---- System ----
FileName : test1.pdf
Directory : .
FileSize : 149 kB
FileModifyDate : 2019:01:16 10:15:06+01:00
FileAccessDate : 2019:01:16 10:14:28+01:00
FileCreateDate : 2019:01:16 09:56:49+01:00
FilePermissions : rw-rw-rw-
---- File ----
FileType : PDF
FileTypeExtension : pdf
MIMEType : application/pdf
---- PDF ----
PDFVersion : 1.5
Linearized : No
Language : fr-FR
TaggedPDF : Yes
PageCount : 1
CreateDate : 2018:11:22 10:00:29+01:00
Creator : Microsoft® Word 2016
ModifyDate : 2019:01:16 10:15:06+01:00
Producer : Microsoft® Word 2016
---- XMP-x ----
XMPToolkit : Adobe XMP Core 5.6-c015 84.159810, 2016/09/10-02:41:30
---- XMP-dc ----
Format : application/pdf
Publisher : WITHOUT EXIFTOOL
---- XMP-xmp ----
CreateDate : 2018:11:22 10:00:29+01:00
CreatorTool : Microsoft® Word 2016
ModifyDate : 2019:01:16 10:15:06+01:00
MetadataDate : 2019:01:16 10:15:06+01:00
---- XMP-pdf ----
Producer : Microsoft® Word 2016
Keywords :
---- XMP-xmpMM ----
DocumentID : uuid:4ef2f10f-870d-4379-8b87-37f80ca0e8d7
InstanceID : uuid:482af9aa-9f73-462a-968e-2273a3231630
When I write with EXIFTOOL (command-line : "exiftool -xmp-dc:publisher="WITH EXIFTOOL" test1.pdf), the result is :
---- ExifTool ----
ExifToolVersion : 10.11
Warning : [Minor] Ignored duplicate Info dictionary
---- System ----
FileName : test1.pdf
Directory : .
FileSize : 149 kB
FileModifyDate : 2019:01:16 10:17:35+01:00
FileAccessDate : 2019:01:16 10:17:35+01:00
FileCreateDate : 2019:01:16 10:17:02+01:00
FilePermissions : rw-rw-rw-
---- File ----
FileType : PDF
FileTypeExtension : pdf
MIMEType : application/pdf
---- PDF ----
PDFVersion : 1.5
Linearized : No
Language : fr-FR
TaggedPDF : Yes
PageCount : 1
CreateDate : 2018:11:22 10:00:29+01:00
Creator : Microsoft® Word 2016
ModifyDate : 2018:11:22 10:10:43+01:00
Producer : Microsoft® Word 2016
---- XMP-x ----
XMPToolkit : Image::ExifTool 10.11
---- XMP-dc ----
Format : application/pdf
Publisher : WITH EXIFTOOL
---- XMP-pdf ----
Producer : Microsoft® Word 2016
---- XMP-xmp ----
CreateDate : 2018:11:22 10:00:29+01:00
CreatorTool : Microsoft® Word 2016
MetadataDate : 2018:11:22 10:10:43+01:00
ModifyDate : 2018:11:22 10:10:43+01:00
---- XMP-xmpMM ----
DocumentID : uuid:4ef2f10f-870d-4379-8b87-37f80ca0e8d7
InstanceID : uuid:9063d405-ccce-4f44-af16-71d3ed288d12
So, I think, it's the same result, no ?
Thank's