x.y(argument).z should be OK in syntax, but it is hard to implement. we can not predict which data type y(argument) would return, and if it can perform dot operation further.
We have implemented DQL(The syntax mentioned here) by translating to SQL. But we priovide only Chinese version now, we will release the English version serveral months later, please keep an eye out if you're interested
One idea would be for the x.y.z to use functions like
x.y(argument).z
This way you could parameterize the traversals and it’d wind up looking like gremlin in sql