Cognite Timeseries Structure

{
  "name": "TimeSeries",
  "description": "A sequence of data points in time order in Cognite Data Fusion, either numeric or string values.",
  "fields": [
    {"name": "id", "type": "integer(int64)", "required": true, "description": "Server-generated internal ID"},
    {"name": "externalId", "type": "string", "required": false, "description": "Client-supplied unique ID (max 255 chars)"},
    {"name": "instanceId", "type": "CogniteInstanceId", "required": false, "description": "Reference to Data Modeling instance"},
    {"name": "name", "type": "string", "required": false, "description": "Display short name (max 255 chars)"},
    {"name": "isString", "type": "boolean", "required": true, "description": "True if time series holds string values"},
    {"name": "type", "type": "enum(numeric|string)", "required": true, "description": "Data type of data points"},
    {"name": "metadata", "type": "object(string->string)", "required": false, "description": "Custom key-value metadata"},
    {"name": "unit", "type": "string", "required": false, "description": "Physical unit free-text (max 32 chars)"},
    {"name": "unitExternalId", "type": "string", "required": false, "description": "Physical unit from unit catalog (max 64 chars)"},
    {"name": "assetId", "type": "integer(int64)", "required": false, "description": "Asset this time series is linked to"},
    {"name": "isStep", "type": "boolean", "required": true, "description": "True if this is a step series (holds last value between points)"},
    {"name": "description", "type": "string", "required": false, "description": "Description (max 1000 chars)"},
    {"name": "securityCategories", "type": "array[integer(int64)]", "required": false, "description": "Required security categories to access"},
    {"name": "dataSetId", "type": "integer(int64)", "required": false, "description": "Dataset this time series belongs to"},
    {"name": "createdTime", "type": "integer(int64)", "required": true, "description": "Creation time as Unix epoch milliseconds"},
    {"name": "lastUpdatedTime", "type": "integer(int64)", "required": true, "description": "Last update time as Unix epoch milliseconds"}
  ],
  "relationships": [
    {"field": "assetId", "target": "Asset", "cardinality": "many-to-one", "description": "Equipment asset link"},
    {"field": "dataSetId", "target": "DataSet", "cardinality": "many-to-one", "description": "Owning dataset"}
  ],
  "endpoints": {
    "list": "GET /timeseries",
    "create": "POST /timeseries",
    "retrieve": "POST /timeseries/byids",
    "update": "POST /timeseries/update",
    "delete": "POST /timeseries/delete",
    "search": "GET /timeseries/search",
    "datapoints_insert": "POST /timeseries/data",
    "datapoints_retrieve": "POST /timeseries/data/list",
    "datapoints_latest": "POST /timeseries/data/latest"
  }
}