A request to translate an LQL query string to its structured representation. Response containing structured representation for the given LQL query. A request to translate an LQL filter string to its structured representation. Response containing structured representation for the given LQL filter. A request to validate an LQL query AST. Response indicating if the input AST is valid (type-checked). A request to validate an LQL filter AST. Response indicating if the input AST is valid (type-checked). Indicate whether there was an lql parsing/validation error. A web service for parsing LQL queries/filters.