how to send XML

[chhsh122]

I received an IMessage of XML plist data, but I don't know how to send it out.
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<plist version=""1.0"">
$archiverNSKeyedArchiver$objects$null$classesLPImageNSObject$classnameLPImage$classCF$UID9MIMETypeCF$UID6dataCF$UID8$classesLPLinkMetadataNSObject$classnameLPLinkMetadata$classCF$UID11URLCF$UID5imageCF$UID10summaryCF$UID2titleCF$UID1version1$classesRichLinkNSObject$classnameRichLink$classCF$UID13richLinkIsPlaceholderrichLinkMetadataCF$UID12$toprootCF$UID14$version100000