sinlin
sinlin - SVG preprocessor, that can add data from .ods files to SVG
... attr="1" attr1="1" attr2="1"></g>
<g attr="2" attr1="2" attr2="2"></g>
<g attr="3" attr1="3" attr2="3"></g>
<g attr="4" attr1="4" attr2="4"></g>
</svg>
Source: https://github.com/step-artur87/sinlin
Tutorial: https://sourceforge.net/projects/sinlin/files/sinlin_tutorial.pdf/download
Examples: https://www.dropbox.com/sh/6ottxnawy5nfils/AABQro2tTlVJhy3LIBmtt4gXa?dl=0
In early April I will suspend development of the program and go offline (probably to September)