Open MaximPlusov opened 3 months ago
MaximPlusov
commented
3 months ago In this document the RoleMap contains duplicated entries:
/CRDclause /Span
/CRDclause /P
/onPages /Div
/onPages /Reference
/NOAAtype /P
/NOAAtype /P
/CRDcitation /P
/CRDcitation /P
/CRDfishimages /Div
/CRDfishimages /Div
/PRPcomment /Para
/PRPcomment /Divverapdf and Acrobat using the value that was found later
MaximPlusov
commented
3 months ago Originally posted by @ozross in https://github.com/duallab/ngPDF/issues/2#issuecomment-2073556947
OK. That is a simple explanation ...
... and I now know the way to prevent it from happening within my LaTeX processing.
But it begs the question of how I could have found this for myself. When listing the RoleMap in Acrobat, or its Preflight utility, it shows only 1 entry in a list sorted alphabetically — which ordering is not how it appears within the PDF itself.
What software do you use to see the RoleMap, ClassMap and other internal code, in a compressed PDF ? Is it free, for Unix/Linux/MacOS ? Or relatively inexpensive ?
MaximPlusov
commented
3 months ago I don't know such programs. I used the veraPDF debugging to explore this case.
MaximPlusov
commented
3 months ago Originally posted by @ozross in https://github.com/duallab/ngPDF/issues/2#issuecomment-2095087287 and https://github.com/duallab/ngPDF/issues/2#issuecomment-2112138406
Great; that's an option of which I was not aware.
How does one turn it on? I'm using the GreenfieldGuiWrapper .
I can see how to adjust Settings, such as the Logging Level, and the Features Config check-box marks (not sure what these give). But don't see anything more detailed for debugging.
With Logging set to ALL I'm getting messages such as:
FINE: Can't get PSObject for COSType COS_UNDEFINED
from getPSObject
and
FINE: Unknown ColorSpace name
from getColorSpaceFromName
and
FINE: java.lang.NumberFormatException: For input string ""
from readNumber
Yet the Compliance is Passed (for PDF/UA-1).
If Logging is set as anything else, these messages do not occur; so I'm guessing that they aren't really important. Nevertheless it would be nice to see just what they refer to, and where it occurs.
Maybe I'm setting a null string () instead of 0 ?
I'd like to learn how to diagnose these completely, even if it isn't crucial.
The image below shows that the PDF validates for both PDF/UA-1 and PDF/A-3a, but there are a significant number of messages written to the shell window, from which the GUI interface was launched.
After unchecking everything in that "Features Config" there are still many messages; so I cannot tell whether any of those settings were relevant. Probably not. Also, I realise now that I can run veraPDF from a command-line shell, and that there's a --debug option. But so far I've not been able to use it to explore the cause of these messages.
Cheers.
Ross@ozross
All these messages are incorrect and we will try to remove it:
FINE: Can't get PSObject for COSType COS_UNDEFINED from getPSObject (already disabled)
and FINE: Unknown ColorSpace name from getColorSpaceFromName (connected with using Indexed color space)
and FINE: java.lang.NumberFormatException: For input string "" from readNumber (connected with '-|' inside Type1 Font Private Part)
Option --debug used only for showing all processed file names
Originally posted by @ozross in https://github.com/duallab/ngPDF/issues/2#issuecomment-2067394063 and https://github.com/duallab/ngPDF/issues/2#issuecomment-2071152016
In a picture sent there are warnings about duplicated dictionary keys. The object ID given is to the /StructTreeRoot dictionary, which seems rather strange. I've traced these to be resulting from the same name being used as a key in both the /RoleMap and /ClassMap dictionaries, which surely is valid though maybe not best practice.
By changing the /RoleMap entry to a relative reference to a separate dictionary object, and similarly for the /ClassMap entry, the warnings no longer occur. Previously these dictionaries were given as direct entries of /StructTreeRoot .
Is there a lesson to be learned here, that could/should be shared in some documentation?
FallMT2022-Jul28.pdf
Here are the warnings:
Here is a picture displaying some of what I think is happening — but it doesn't indicate or explain all of it.
There are 3 keys that are used in both the
RoleMapandClassMap:/CRDclause,/CRDfishimages,/PRPcommentone key that differs in the case of a single letter:/CRDcitationrole, as opposed to/CRDCitationclass with no duplication for 2 others:/onPagesand/NOAAtype.Indeed the latter
/NOAAtypeis not used at all within the structure tree, except as a titleNOAAtypeof 2 different objects:top.01andtop.05objects 551 and ??? respectively.Hope this helps.