Service check request message element. Service check response message element. Notification interpretation identifier. Service status notification message element. Service status acknowledgement message element. xsd:dateTime that requires a timezone indicator. Unique identity identifier. Unique identifier. Tri-state media availability indicator. Original message identifier. Reference to original message. Non empty xsd:string. Reference to a specific registration message. Message retransmission identifier. Message origin identifier. Interface version number. Common attributes required by all message elements. Unique message element identifier. Assigned specification part version number. Logical service source identifier. Message origin identifier. Common attributes on all request/notification message elements. Message retransmission identifier. Common attributes on all response/acknowledgement message elements. Reference to original message. Common request message attributes. Private data to be returned (i.e., echoed back) in the response message. Common response message attributes and elements. Private data returned (i.e., echoed back) by the request message recipient if present in the original request message. Request processing status code. Common notification mesage attributes. Private data to be returned (i.e., echoed back) in the acknowledgement message. Common acknowledgement message attribues and elements. Private data returned (i.e., echoed back) by the notification message recipient if present in the original notification message. Notification processing status code. Endpoint information type. Endpoint information. Ad type identification. Provider identification. For example, CableLabs ADI. Asset identification and may be scoped by Provider identification. For example, CableLabs ADI. Asset identification. Specific message to be delivered via the supplied destination. Omit if all messages are to be delivered to the specified destination. All messages or per message type destination endpoint identification. Content identification. Uniquely identifies a single piece of content (i.e. only one content entity). Multiple identification methods may be used to reference the single, unique content item. For exmaple, ad-ID and V-ISAN. Group of content location identifiers. Additional content information Extensibility - elements from any namespace. The "metadata" from any auxillary sources are located herein. Unique identifier. Content (entertainment, ad, etc.) description and identification. Content data model general type. Content data model identifier. Typically, a URI. Media availability indicator. True=Asset available. False=Asset not available. Omitted = Asset availability unknown. Time format PnYn MnDTnH nMn.nnnS Specific run-time length. Extensibility - elements from any namespace. Identifier, typically a URL, specifying the detail attribute's source. External status code as defined by the referenced source. Status code from an external (non-SCTE 130) specification. Private data returned (i.e., echoed back) by the message respondent. Descriptive text. Unique program identifier. Reference date and time. Program name and/or identification. A value from SCTE 35 Table 8-6 identifying the information format. The information length in bytes. Limits may be applied as per SCTE 35 Table 8-6. A 32-bit unique segmentation event identifier. The segmentation type as specified by SCTE 35 Table 8-7. Identification of a specific segment within a segmentation upid. Expected number of individual segments within the segmentation upid. Contextual reference date and time. SCTE 35 segmentation descriptor construct. The value is the segmentation upid. Traffic ID generated by the traffic and billing system. Traffic and billing assigned spot identifier. Operator/MSO entered value provided by the traffic and billing system. Operator/MSO entered value provided by the traffic and billing system. For SCTE 118, one of the following: SCHED=Scheduled, FILL=Fill, BONUS=Bonus. e.g., Interconnect, Local, National, Marketing, etc. Assigned by the originating traffic and billing system. Advertising digital identifier. Typically, an SCTE 118 spot element. One of the following values: 0 = Success 1 = Error 2 = Warning 3 = Information 4 = External status code ... = User defined and outside the scope of this specification. A SCTE 130 specific status code. See the specification for additional details. SCTE 130 status code. ADS specified identifier. Uniform resource identifier.