| ^((<|>)?=?)s*(\s*[v=]*\s*([0-9]+)\.([0-9]+)\.([0-9]+)(-[0-9]+-?)?([a-zA-Z-+][a-zA-Z0-9-.:]*)?)$|^$ | |
| >=0.6.0-,>=,>,0.6.0-,0,6,0,,- | |
| =0.6.0-,=,,0.6.0-,0,6,0,,- | |
| 0.6.0-,,,0.6.0-,0,6,0,,- | |
| <=0.6.0-,<=,<,0.6.0-,0,6,0,,- | |
| >=0.6.0-a:b-c.d,>=,>,0.6.0-a:b-c.d,0,6,0,,-a:b-c.d | |
| =0.6.0-a:b-c.d,=,,0.6.0-a:b-c.d,0,6,0,,-a:b-c.d | |
| 0.6.0+a:b-c.d,,,0.6.0+a:b-c.d,0,6,0,,+a:b-c.d | |
| <=0.6.0+a:b-c.d,<=,<,0.6.0+a:b-c.d,0,6,0,,+a:b-c.d | |
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