Xml2rfc generates RFCs and IETF drafts from document source in XML according to the IETF xml2rfc v2 and v3 vocabularies.
The IETF uses a specific format for the standards and other documents it publishes as RFCs, and for the draft documents which are produced when developing documents for publications. There exists a number of different tools to facilitate the formatting of drafts and RFCs according to the existing rules, and this tool, xml2rfc, is one of them. It takes as input an xml file which contains the text and meta-information about author names etc., and transforms it into suitably formatted output. The input xml file should follow the grammars in RFC7749 (for v2 documents) or RFC7991 (for v3 documents). Note that the grammar for v3 is still being refined, and changes will eventually be captured in the bis draft for 7991. Changes not yet captured can be seen in the xml2rfc source v3.rng, or in the documentation xml2rfc produces with its –doc flag.
xml2rfc provides a variety of output formats. See the command line help for a full list of formats. It also provides conversion from v2 to v3, and can run the preptool on its input.
Installation of the python package is done as usual with ‘pip install xml2rfc’, using appropriate switches and/or sudo.
Installation of support libraries for the PDF-formatter
In order to generate PDFs, xml2rfc uses the WeasyPrint module, which depends on external libaries that must be installed as native packages on your platform, separately from the xml2rfc install.
First, install the Cairo, Pango, and GDK-PixBuf library files on your system. See installation instructions on the WeasyPrint Docs:
(On some OS X systems with System Integrity Protection active, you may need to create a symlink from your home directory to the library installation directory (often /opt/local/lib):
ln -s /opt/local/lib ~/lib
in order for weasyprint to find the installed cairo and pango libraries. Whether this is needed or not depends on whether you used macports or homebrew to install cairo and pango, and the homebrew / macport version.)
Next, install the pycairo and weasyprint python modules using pip. Depending on your system, you may need to use ‘sudo’ or install in user-specific directories, using the –user switch. On OS X in particular, you may also need to install a newer version of setuptools using –user before weasyprint can be installed. If you install with the –user switch, you may need to also set PYTHONPATH, e.g.,
for Python 3.6.
The basic pip commands (modify as needed according to the text above) are:
pip install ‘pycairo>=1.18’ ‘weasyprint<=0.42.3’
With these installed and available to xml2rfc, the –pdf switch will be enabled.
For PDF output, you also need to install the Noto font set. Download the full set from https://noto-website-2.storage.googleapis.com/pkgs/Noto-unhinted.zip, and install as appropriate for your platform.
xml2rfc accepts a single XML document as input and outputs to one or more conversion formats.
Basic Usage: xml2rfc SOURCE [options] FORMATS...
Run xml2rfc --help for a full listing of command-line options.
Version 3.9.1 (25 Jun 2021)
- This is a cosmetic release, only to correct issues with the changelog formatting in 3.9.0
Version 3.9.0 (25 Jun 2021)
- Merged in  from firstname.lastname@example.org: Stop stripping CDATA with v2v3 option. Fixes #601.
- Merged in  from email@example.com: Implement bare attribute rendering in HTML and PDF. Fixes #609.
- Merged in  from firstname.lastname@example.org: Add https://datatracker.ietf.org/doc/html/ as default id-base-url and id-reference-base-url. Fixes #618.
- Merged in  from email@example.com: Use ‘appendix-A.1’ format for section ids in HTML output. Use ‘section-appendix-…’ as XML id both for all appendixes, not just top level. Fixes #581.
- Merged in  from firstname.lastname@example.org: Define entities in v2v3 output instead of referencing an external DTD. Fixes #548.
- Properly reflect the updates to headers and boilerplate reflecting erratum 5258. Fixes #648.
Version 3.8.0 (20 May 2021)
- Merged in  from email@example.com: Fix indentation error that prevented normalizing ascii-art whitespace. Fixes #403.
- Merged in  from firstname.lastname@example.org: Insert removeInRFC notice as first child even when <name> tag is absent. Fixes #622.
- Merged in  from email@example.com: Handle <iref> as child of most of its allowed parent elements. An <aside> parent is still not handled properly. Fixes #620.
- Merged in  from firstname.lastname@example.org: Refer to un-numbered sections by name rather than number. Fixes #572.
- Merged in  and  from email@example.com: Create tests-no-network and clear-cache Makefile targets to support network-free testing. Updates to tests/cache and tests/valid so tests pass with and without network. Fixes #561.
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