In TokenScript, TokenFilter is like the search query of tokens
A filter is used for a TokenScript engine to find tokens, Data Objects (such as Ethereum Events) and attestations by its attributes.
It's format resembles a SQL search query. The following demonstrate an example of TokenFilter used in TokenScript 1.0, but is being replaced with a work-in-progress new schema.
Example: Find all tokens with an attribute locality whose value is "Sydney".
Suppose the token we are working with is AirBnB Booking token, where each token represents an AirBnB booking. Let's say AirBnB token has an attribute locality which is a string. The following filter would result in all of the bookings made in Sydney: