The typical approach is something like a tree kernel (https://en.wikipedia.org/wiki/Tree_kernel https://en.wikipedia.org/wiki/Tree_kernel). Looked into them bri

The typical approach is something like a tree kernel (https://en.wikipedia.org/wiki/Tree_kernel https://en.wikipedia.org/wiki/Tree_kernel). Looked into them briefly for a work project that never got off the ground, can't say too much about using them in practice.