[Trisquel-users] Re : What are your favorite command-line programs?

[lcerf]

SVG actually is the vectorial formats that the Web uses. And, again, I am  
talking about modifying an SVG graphics by editing it with a text editor (no  
middle-technology). Just try to open a simple SVG file  
(https://upload.wikimedia.org/wikipedia/commons/1/1a/SVG_example_markup_grid.svg  
for instance) in any text editor, change some number or some color, save, and  
visualize the result (with a Web browser for instance): the image changes!

Many formats (not executables, raster pictures, sounds and videos though)  
actually are text files that the related program interprets. Some formats  
(such as SVG) is one single text file, other formats are (compressed) set of  
text files. Try to open any OpenDocument (LibreOffice's format) file from the  
"Archive Manager" for instance. It will show you several files. One of them  
is content.xml. Open it in a text editor and you will see in plain text the  
content of the document. And guess what: its "grammar" is a specialization of  
XML too!