spaCy includes a collection of functions that can identify whether a token has some specific attributes (for example, it is a URL!).
spaCy built-in functions for lexical attributes
For a complete list of spaCy built-in functions for lexical attributes have a look here.
Greek modifications to spaCy built-in functions
Currently, the Greek spaCy models have overwritten only like_num spaCy function which checks if a token represents a numerical expression.
The modifications include a check in a list of words that represent numerical expressions in Greek, a check whether the token represents a fraction or a check whether the token represents a power of a number.
In this way, we can catch expressions like the following: