EmptyError returns a string explanation of a "must not be empty" validation failure.

InclusiveRangeError returns a string explanation of a numeric "must be between" validation failure.

IsCIdentifier tests for a string that conforms the definition of an identifier in C.

IsConfigMapKey tests for a string that is a valid key for a ConfigMap or Secret.

IsDNS1035Label tests for a string that conforms to the definition of a label in DNS (RFC 1035).

IsDNS1123Label tests for a string that conforms to the definition of a label in DNS (RFC 1123).

IsDNS1123Subdomain tests for a string that conforms to the definition of a subdomain in DNS (RFC 1123).

IsHTTPHeaderName checks that a string conforms to the Go HTTP library's definition of a valid header field name (a stricter subset than RFC7230).

IsQualifiedName tests whether the value passed is what Kubernetes calls a "qualified name".

IsValidGroupId tests that the argument is a valid Unix GID.

IsValidIP tests that the argument is a valid IP address.

IsValidLabelValue tests whether the value passed is a valid label value.

IsValidPortName check that the argument is valid syntax.

IsValidPortNum tests that the argument is a valid, non-zero port number.

IsValidUserId tests that the argument is a valid Unix UID.

IsWildcardDNS1123Subdomain tests for a string that conforms to the definition of a wildcard subdomain in DNS (RFC 1034 section 4.3.3).

MaxLenError returns a string explanation of a "string too long" validation failure.

RegexError returns a string explanation of a regex validation failure.

Operator represents a key/field's relationship to value(s).