On 4/15/2025 5:24 PM, Pablo Rodriguez via ntg-context wrote:
On 4/14/25 11:57, Steffen Wolfrum wrote:
There is an improvement: now the tags are identified as <Figure> and
<Formula>!
But still the figures label={this is a cow} is missing.
Sorry, Steffen, I thought I explained this in a previous message.
Alternative text is missing from \externalfigure, because this is the
generated PDF object:
17 0 obj
<<
/K [ <<
/Alt <FEFF0063006F0077>
/MCID 1
/Pg 1 0 R
/Type /MCR
>> ]
/P 15 0 R
/Pg 1 0 R
/S /image
>>
endobj
But it should read:
17 0 obj
<<
/K [ <<
/MCID 1
/Pg 1 0 R
/Type /MCR
>> ]
/Alt <FEFF0063006F0077>
/P 15 0 R
/Pg 1 0 R
/S /image
>>
endobj
All I know is that it has to be fixed in lpdf-tag.lmt, but I don’t know
how to fix it.
you can move the Alt and test
local d = pdfdictionary {
Type = pdf_mcr,
Pg = pageref,
MCID = last,
}
parent.dict.Alt = pdfunicode(label ~= "" and label or "image")
It is the same for alternative texts in formulas for PDF/UA-1.
you can play with
-- Alt = alternate,
NS = namespace,
ActualText = actualtext or nil,
Alt = actualtext or nil,
NS = namespace,
-- ActualText = actualtext or nil,
and such to see if your viewer does soemthing useful
Hans
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