DICOM PS3.18 2021b - Web Services

8.4.3 Payload Header Fields (Current)
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### 8.4.3 Payload Header Fields

The Payload Header Fields contain metadata describing the payload, not the representation it contains. Table 8.4.3-1 describes the payload header fields, and the usage requirements (Mandatory, Conditional, or Optional) for when they shall be present.

Table 8.4.3-1. Payload Header Fields

Name | Value | Usage | Description
--- | --- | --- | ---
Content-Length | uint | C | Specifies the decimal number of octets in the payload. If the response message has a payload and does not have a Content-Encoding header field, it shall have a Content-Length header field specifying the length in octets (bytes) of the payload. Shall not be present if the message has a Content-Encoding header field. Shall be present otherwise, even is the size of the payload is zero.
Content-Range | range | C | Specifies the range of a partial representation contained in a payload. See [RFC7233] Section 4.2. The Content-Range header field is sent in a single part 206 (Partial Content) response to indicate the partial range of the selected representation enclosed as the message payload. It is sent in each part of a multipart 206 response to indicate the range enclosed within each body part. It is sent in 416 (Range Not Satisfiable) responses to provide information about the selected representation.
Transfer-Encoding | encoding | C | See [RFC7230] Section 3.3.1. Shall be present if transfer-encodings have been applied to the payload.

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8.4.2 Content Representation Header Fields | Home | 8.5 Status Codes

DICOM PS3.18 2021b - Web Services