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@ivar rdclass: The class of the rdataset
@type rdclass: int
@ivar rdtype: The type of the rdataset
@type rdtype: int
@ivar covers: The covered type. Usually this value is
dns.rdatatype.NONE, but if the rdtype is dns.rdatatype.SIG or
dns.rdatatype.RRSIG, then the covers value will be the rdata
type the SIG/RRSIG covers. The library treats the SIG and RRSIG
types as if they were a family of
types, e.g. RRSIG(A), RRSIG(NS), RRSIG(SOA). This makes RRSIGs much
easier to work with than if RRSIGs covering different rdata
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@type covers: int
@ivar ttl: The DNS TTL (Time To Live) value
@type ttl: int
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� tt| �j|� dS )a% Add the specified rdata to the rdataset.
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to_text() method.
@param name: If name is not None, emit a RRs with I{name} as
the owner name.
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@type file: file
@param compress: The compression table to use; the default is None.
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@returns: the number of records emitted
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