4.4.2 ChannelMetadata Message
| Topic Version | 1 | Published | 10/16/2017 | |
| For Standard | ETPW20 v1 | |||
For this particular example, the producer replies to the ChannelDescribe message with the following ChannelMetatdata message; below, also see the domain object XML.
// [e5245366-2d61-4769-89a1-e36475439f28] Message received at 2017-04-14 14:07:50.1001{
"protocol":1,
"messageType":2,
"correlationId":3,
"messageId":2,
"messageFlags":3}{
"channels": [ {
"channelUri": " eml://witsml20/Channel(cb224581-c2be-4fc6-be5f-91da7904fe7f)",
"channelId": 1,
"indexes": [ {
"indexType": "Time",
"uom": "us",
"depthDatum": null,
"direction": "Increasing",
"mnemonic": null,
"description": "Time sent",
"uri": null,
"customData": {},
"scale": 0,
"timeDatum": null } ],
"channelName": "ALARM",
"dataType": "string",
"uom": "none",
"startIndex": null,
"endIndex": null,
"description": "Alarm",
"status": "Active",
"contentType": null,
"source": "Console",
"measureClass": "Unitless",
"uuid": "cb224581-c2be-4fc6-be5f-91da7904fe7f",
"customData": {},
"domainObject": {
"resource": {
"uri": "eml://witsml20/Channel(cb224581-c2be-4fc6-be5f-91da7904fe7f)",
"contentType": "application/x-witsml+xml;version=2.0;type=Channel",
"name": "ALARM",
"channelSubscribable": true,
"customData": {},
"resourceType": "DataObject",
"hasChildren": 0,
"uuid": "cb224581-c2be-4fc6-be5f-91da7904fe7f",
"lastChanged": 1492196225411050,
"objectNotifiable": true },
"contentEncoding": "",
"data": [ binary data truncated for readability ] } }, {
"channelUri": " eml://witsml20/Channel(503be6e8-47c7-45de-a2e9-af7850301cef)",
"channelId": 2,
"indexes": [ {
"indexType": "Time",
"uom": "us",
"depthDatum": null,
"direction": "Increasing",
"mnemonic": null,
"description": "Time sent",
"uri": null,
"customData": {},
"scale": 0,
"timeDatum": null } ],
"channelName": "ALERT",
"dataType": "string",
"uom": "none",
"startIndex": null,
"endIndex": null,
"description": "Alert",
"status": "Active",
"contentType": null,
"source": "Console",
"measureClass": "Unitless",
"uuid": "503be6e8-47c7-45de-a2e9-af7850301cef",
"customData": {},
"domainObject": {
"resource": {
"uri": "eml://witsml20/Channel(503be6e8-47c7-45de-a2e9-af7850301cef)",
"contentType": "application/x-witsml+xml;version=2.0;type=Channel",
"name": "ALERT",
"channelSubscribable": true,
"customData": {},
"resourceType": "DataObject",
"hasChildren": 0,
"uuid": "503be6e8-47c7-45de-a2e9-af7850301cef",
"lastChanged": 1492196225431674,
"objectNotifiable": true },
"contentEncoding": "",
"data": [ binary data truncated for readability ] } }, {
"channelUri": " eml://witsml20/Channel(5579b4a1-994a-415d-b511-39b7b4fe0ee6)",
"channelId": 3,
"indexes": [ {
"indexType": "Time",
"uom": "us",
"depthDatum": null,
"direction": "Increasing",
"mnemonic": null,
"description": "Time sent",
"uri": null,
"customData": {},
"scale": 0,
"timeDatum": null } ],
"channelName": "ANNOT",
"dataType": "string",
"uom": "none",
"startIndex": null,
"endIndex": null,
"description": "Annotation",
"status": "Active",
"contentType": null,
"source": "Console",
"measureClass": "Unitless",
"uuid": "5579b4a1-994a-415d-b511-39b7b4fe0ee6",
"customData": {},
"domainObject": {
"resource": {
"uri": "eml://witsml20/Channel(5579b4a1-994a-415d-b511-39b7b4fe0ee6)",
"contentType": "application/x-witsml+xml;version=2.0;type=Channel",
"name": "ANNOT",
"channelSubscribable": true,
"customData": {},
"resourceType": "DataObject",
"hasChildren": 0,
"uuid": "5579b4a1-994a-415d-b511-39b7b4fe0ee6",
"lastChanged": 1492196225448718,
"objectNotifiable": true },
"contentEncoding": "",
"data": [ binary data truncated for readability ] } } ]}
Example Channel data object decoded as XML:
<Channel xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dc="http://purl.org/dc/terms/" xmlns:gml="http://www.opengis.net/gml/3.2" schemaVersion="2.0" uuid="cb224581-c2be-4fc6-be5f-91da7904fe7f" xmlns="http://www.energistics.org/energyml/data/witsmlv2">
<Citation xmlns="http://www.energistics.org/energyml/data/commonv2">
<Title>ALARM</Title>
<Originator>PDS</Originator>
<Creation>2017-04-14T00:00:00Z</Creation>
<Format>MessageConsole</Format>
<LastUpdate>2017-04-14T23:05:06.233893Z</LastUpdate>
<Description>Alarm</Description>
</Citation>
<Mnemonic>ALARM</Mnemonic>
<DataType>double</DataType>
<Uom xsi:nil="true" />
<GrowingStatus>active</GrowingStatus>
<Wellbore>
<ContentType xmlns="http://www.energistics.org/energyml/data/commonv2">application/x-witsml+xml;version=2.0;type=Wellbore</ContentType>
<Title xmlns="http://www.energistics.org/energyml/data/commonv2">WB-A1</Title>
<Uuid xmlns="http://www.energistics.org/energyml/data/commonv2">2cf95836-8d9c-4b56-a6a0-803d21e12a24</Uuid>
</Wellbore>
<TimeDepth>Time</TimeDepth>
<ChannelClass>
<ContentType xmlns="http://www.energistics.org/energyml/data/commonv2">application/x-eml+xml;version=2.1;type=PropertyKind</ContentType>
<Title xmlns="http://www.energistics.org/energyml/data/commonv2">none</Title>
<Uuid xmlns="http://www.energistics.org/energyml/data/commonv2">a818e404-dbc9-41e0-adc8-455eafc5b8d1</Uuid>
</ChannelClass>
<LoggingCompanyName>PDS</LoggingCompanyName>
<Index>
<IndexType>date time</IndexType>
<Uom>us</Uom>
<Direction>increasing</Direction>
</Index>
</Channel>