Basics Many operators are specified with an uppercase and a lowercase syntax, unless specified otherwise, the convention of SVG is that uppercase operators interpret coordinates as absolute positions, and lowercase operators interpret as displacements. Resources The official SVG2 Specification. Tools: InkSpace is a feature-rich editor, but the end-result mark-up is clutered with custom attributes and it is challenging to configure it to use minimal mark-up without changing export options every time. SVG-Edit is a good online editor, producing unclutered outputs.