t represents ASN.1 value.

        If *isValue* is `False` then this object represents just ASN.1 schema.

        If *isValue* is `True` then, in addition to its ASN.1 schema features,
        this object can also be used like a Python built-in object (e.g. `int`,
        `str`, `dict` etc.).

        Returns
        -------
        : :class:`bool`
            :class:`False` if object represents just ASN.1 schema.
            :class:`True` if object represents ASN.1 schema and can be used as a normal value.

        Note
        ----
        There is an important distinction between PyASN1 schema and value objects.
        The PyASN1 schema objects can only participate in ASN.1 schema-related
        operations (e.g. defining or testing the structure of the data). Most
        obvious uses of ASN.1 schema is to guide serialisation codecs whilst
        encoding/decoding serialised ASN.1 contents.

        The PyASN1 value objects can **additionally** participate in many operations
        involving regular Python objects (e.g. arithmetic, comprehension etc).
        )