ext

const (
	// SpanKindKey is the SpanKind tag key
	SpanKindKey = "span.kind"

	// SpanKindClientValue is the SpanKindClient tag value
	SpanKindClientValue = "client"

	// SpanKindServerValue is the SpanKindServer tag value
	SpanKindServerValue = "server"

	// ComponentKey is the tag key for a low-cardinality identifier of the module,
	// library, or package that is generating a span.
	ComponentKey = "component"

	// DbInstanceKey is the tag key for a Database instance name. E.g., In java, if the
	// jdbc.url="jdbc:mysql://127.0.0.1:3306/customers", the instance name is "customers".
	DbInstanceKey = "db.instance"

	// DbStatementKey is the tag key for a database statement for the given database
	// type. E.g., for db.type="SQL", "SELECT * FROM wuser_table"; for db.type="redis",
	// "SET mykey 'WuValue'".
	DbStatementKey = "db.statement"

	// DbTypeKey is the tag key for a Database type. For any SQL database, "sql". For others,
	// the lower-case database category, e.g. "cassandra", "hbase", or "redis".
	DbTypeKey = "db.type"

	// DbUserKey is the tag key for a Username for accessing database. E.g.,
	// "readonly_user" or "reporting_user"
	DbUserKey = "db.user"

	// PeerServiceKey is the key for a tag that records the service name of the peer
	PeerServiceKey = "peer.service"

	// PeerHostnameKey is the key for a tag that records the host name of the peer
	PeerHostnameKey = "peer.hostname"

	// PeerHostIPv4Key is the key for a tag that records IP v4 host address of the peer
	PeerHostIPv4Key = "peer.ipv4"

	// PeerHostIPv6Key is the key for a tag that records IP v6 host address of the peer
	PeerHostIPv6Key = "peer.ipv6"

	// PeerPortKey is the key for a tag that records port number of the peer
	PeerPortKey = "peer.port"

	// HTTPUrlKey is the key for a tag that should be the URL of the request being
	// handled in this segment of the trace, in standard URI format. The protocol
	// is optional.
	HTTPUrlKey = "http.url"

	// HTTPMethodKey is the key for a tag that is the HTTP method of the request,
	// and is case-insensitive.
	HTTPMethodKey = "http.method"

	// HTTPStatusCodeKey is the numeric HTTP status code (200, 404, etc) of the
	// HTTP response.
	HTTPStatusCodeKey = "http.status_code"

	// ErrorKey is the key for a tag that indicates that operation represented by
	// the span resulted in an error.
	ErrorKey = "error"

	// HTTPRemoteAddrKey is the key for a tag that reprents the X-Forwarded-For
	// header or Client IP of the caller
	HTTPRemoteAddrKey = "http.remote_addr"

	// HTTPUserAgentKey is the key for the UserAgent tag
	HTTPUserAgentKey = "http.user_agent"
)