Search notes:

OData-Service-Root/stringmaps

Apparently, service/stringmaps allows to query the details of option set fields.
objecttypecode seems to refer to an entity type (?) while attributename should be self explaining. 
WEPAPIROOT/stringmaps?$filter=objecttypecode eq 'account' and attributename eq 'address1_shippingmethodcode'&$select=value,attributevalue&$orderby=displayorder

See also

OData Web API

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/developm...', 1788504484, '216.73.217.21', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/Data/OData/Web-API/stringmaps/index(42): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78