Re: [docbook-apps] CreationDate in PDF files' metadata

[Bob Stayton <bobs@sagehill.net>]

Hi Filippo,

Information about embedding metadata in fo output which goes to the PDF is found here:

https://xmlgraphics.apache.org/fop/2.3/metadata.html

The data can be changed by customizing this template found in fo/fop1.xsl:

<xsl:template name="fop1-document-information">

Bob Stayton
Sagehill Enterprises
bobs@sagehill.net

On 3/28/2019 4:06 AM, Filippo Rusconi wrote:

Greetings,

I document my software using DocBook5 in a Debian GNU/Linux box. When the PDF
files are generated, the CreationDate field gets filled-up using a new value at
each run. This is a problem in our Debian effort to have "reproducible builds"
[0] with the "forensic science" idea that the same code should produce the same
binaries bit-by-bit [1].

It seems that FOP is responsible for filling-in the CreationDate field.
Are you aware of a method to direct FOP in some manner to fill-in that
CreationDate with a constant value?

Thank you for your kind attention,

Sincerely,
Filippo

0 https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/msxpertsuite.html
1 https://reproducible-builds.org/