| AGGREGATOR_CLEAR_NEVER | drupal/modules/aggregator/aggregator.module | Denotes that a feed's items should never expire. |
| APACHESOLR_API_VERSION | contributions/apachesolr/apachesolr.module | |
| APACHESOLR_READ_ONLY | contributions/apachesolr/apachesolr.module | |
| APACHESOLR_READ_WRITE | contributions/apachesolr/apachesolr.module | |
| ARCHIVE_TAR_ATT_SEPARATOR | drupal/modules/system/system.tar.inc | |
| ARCHIVE_TAR_END_BLOCK | drupal/modules/system/system.tar.inc | |
| AUTHNET_LIVE_SERVER | contributions/commerce_authnet_simdpm/commerce_authnet_simdpm.module | Authorize.Net server addresses. |
| AUTHNET_TEST_SERVER | contributions/commerce_authnet_simdpm/commerce_authnet_simdpm.module | |
| AUTHNET_TXN_MODE_DEVELOPER | contributions/commerce_authnet/commerce_authnet.module | |
| AUTHNET_TXN_MODE_LIVE | contributions/commerce_authnet/commerce_authnet.module | |
| AUTHNET_TXN_MODE_LIVE_TEST | contributions/commerce_authnet/commerce_authnet.module | |
| AUTHOR_MAILTEXT | contributions/comment_notify/comment_notify.module | |
| AUTO_NODETITLE_DISABLED | contributions/auto_nodetitle/auto_nodetitle.module | |
| AUTO_NODETITLE_ENABLED | contributions/auto_nodetitle/auto_nodetitle.module | |
| AUTO_NODETITLE_OPTIONAL | contributions/auto_nodetitle/auto_nodetitle.module | |
| BACKUP_MIGRATE_FILENAME_MAXLENGTH | contributions/backup_migrate/includes/files.inc | |
| BACKUP_MIGRATE_MENU_DEPTH | contributions/backup_migrate/backup_migrate.module | |
| BACKUP_MIGRATE_MENU_PATH | contributions/backup_migrate/backup_migrate.module | |
| BACKUP_MIGRATE_STORAGE_DB | contributions/backup_migrate/includes/crud.inc | |
| BACKUP_MIGRATE_STORAGE_NONE | contributions/backup_migrate/includes/crud.inc | |
| BACKUP_MIGRATE_STORAGE_OVERRIDEN | contributions/backup_migrate/includes/crud.inc | |
| BACKUP_MIGRATE_VERSION | contributions/backup_migrate/backup_migrate.module | |
| BLOCK_CUSTOM_DISABLED | drupal/modules/block/block.module | Hide this block by default but let individual users show it. |
| BLOCK_CUSTOM_ENABLED | drupal/modules/block/block.module | Show this block by default, but let individual users hide it. |
| BLOCK_CUSTOM_FIXED | drupal/modules/block/block.module | Users cannot control whether or not they see this block. |
| BLOCK_REGION_NONE | drupal/modules/block/block.module | Denotes that a block is not enabled in any region and should not be shown. |
| BLOCK_VISIBILITY_LISTED | drupal/modules/block/block.module | Show this block on only the listed pages. |
| BLOCK_VISIBILITY_NOTLISTED | drupal/modules/block/block.module | Show this block on every page except the listed pages. |
| BLOCK_VISIBILITY_PHP | drupal/modules/block/block.module | Show this block if the associated PHP code returns TRUE. |
| CACHE_PERMANENT | drupal/includes/bootstrap.inc | Indicates that the item should never be removed unless explicitly selected. |
| CACHE_TEMPORARY | drupal/includes/bootstrap.inc | Indicates that the item should be removed at the next general cache wipe. |
| CALENDAR_EMPTY_STRIPE | contributions/calendar/calendar.module | |
| CALENDAR_HIDE_ALL | contributions/calendar/calendar.module | |
| CALENDAR_SHOW_ALL | contributions/calendar/calendar.module | |
| CAPTCHA_DEFAULT_VALIDATION_CASE_INSENSITIVE | contributions/captcha/captcha.module | |
| CAPTCHA_DEFAULT_VALIDATION_CASE_SENSITIVE | contributions/captcha/captcha.module | |
| CAPTCHA_PERSISTENCE_SHOW_ALWAYS | contributions/captcha/captcha.module | |
| CAPTCHA_PERSISTENCE_SKIP_ONCE_SUCCESSFUL | contributions/captcha/captcha.module | |
| CAPTCHA_PERSISTENCE_SKIP_ONCE_SUCCESSFUL_PER_FORM_INSTANCE | contributions/captcha/captcha.module | |
| CAPTCHA_PERSISTENCE_SKIP_ONCE_SUCCESSFUL_PER_FORM_TYPE | contributions/captcha/captcha.module | |
| CAPTCHA_SESSION_REUSE_ATTACK_ERROR_MESSAGE | contributions/captcha/captcha.test | |
| CAPTCHA_STATUS_EXAMPLE | contributions/captcha/captcha.module | |
| CAPTCHA_STATUS_SOLVED | contributions/captcha/captcha.module | |
| CAPTCHA_STATUS_UNSOLVED | contributions/captcha/captcha.module | |
| CAPTCHA_UNKNOWN_CSID_ERROR_MESSAGE | contributions/captcha/captcha.test | |
| CAPTCHA_WRONG_RESPONSE_ERROR_MESSAGE | contributions/captcha/captcha.test | |
| CHECK_PLAIN | drupal/includes/bootstrap.inc | Flag for drupal_set_title(); text is not sanitized, so run check_plain(). |
| CM_TO_CM | contributions/ubercart/uc_store/uc_store.module | Converts centimeters to centimeters. |
| CM_TO_FT | contributions/ubercart/uc_store/uc_store.module | Converts centimeters to feet. |
| CM_TO_IN | contributions/ubercart/uc_store/uc_store.module | Converts centimeters to inches. |