private String getWARCMetadataRecord(MetaData m) { return unwrapFirst(warcMetadataRecord.extract(m), "-"); }
private String getWARCURL(MetaData m) { return unwrapFirst(warcURL.extract(m), "-"); }
private String getWARCType(MetaData m) { return unwrapFirst(warcType.extract(m), "-"); }
private String getEnvelopeFormat(MetaData m) { return unwrapFirst(formatSpec.extract(m), "-"); }