URL structure ============= Queries are performed via web services using a url URL that contains the following ingredients: url = base_url/service?query_string 1. base_url = The base webpage utilized in the API https://www.uclageo.com/gm_database/api/index.php. Note that entering the base url into your web browser without also specifying a resource and query string will take you to this documentation page. The resource is necessary to retrieve data from the database. The query string is optional, and can be used to customize your queries. 2. resource = A resource corresponds to a particular quantity that a uers might want information about. Supported resources include schema, flatfile, response_spectra, and fourier_spectra, as described in more detail through links in the navigation tree. 3. query_string = A list of parameters used to specify the output format, number of records, ranges of database fields, etc.