A shallow XML parser utilizing regular expressions:
$TextSE = "[^<]+"; $UntilHyphen = "[^-]*-"; $Until2Hyphens = "$UntilHyphen(?:[^-]$UntilHyphen)*-"; $CommentCE = "$Until2Hyphens>?"; $UntilRSBs = "[^\\]]*](?:[^\\]]+])*]+"; $CDATA_CE = "$UntilRSBs(?:[^\\]>]$UntilRSBs)*>"; $S = "[ \\n\\t\\r]+"; $NameStrt = "[A-Za-z_:]|[^\\x00-\\x7F]"; $NameChar = "[A-Za-z0-9_:.-]|[^\\x00-\\x7F]"; $Name = "(?:$NameStrt)(?:$NameChar)*"; $QuoteSE = "\"[^\"]*\"|'[^']*'"; $DT_IdentSE = "$S$Name(?:$S(?:$Name|$QuoteSE))*"; $MarkupDeclCE = "(?:[^\\]\"'><]+|$QuoteSE)*>"; $S1 = "[\\n\\r\\t ]"; $UntilQMs = "[^?]*\\?+"; $PI_Tail = "\\?>|$S1$UntilQMs(?:[^>?]$UntilQMs)*>"; $DT_ItemSE = "<(?:!(?:--$Until2Hyphens>|[^-]$MarkupDeclCE)|\\?$Name(?:$PI_Tail))|%$Name;|$S"; $DocTypeCE = "$DT_IdentSE(?:$S)?(?:\\[(?:$DT_ItemSE)*](?:$S)?)?>?"; $DeclCE = "--(?:$CommentCE)?|\\[CDATA\\[(?:$CDATA_CE)?|DOCTYPE(?:$DocTypeCE)?"; $PI_CE = "$Name(?:$PI_Tail)?"; $EndTagCE = "$Name(?:$S)?>?"; $AttValSE = "\"[^<\"]*\"|'[^<']*'"; $ElemTagCE = "$Name(?:$S$Name(?:$S)?=(?:$S)?(?:$AttValSE))*(?:$S)?/?>?"; $MarkupSPE = "<(?:!(?:$DeclCE)?|\\?(?:$PI_CE)?|/(?:$EndTagCE)?|(?:$ElemTagCE)?)"; $XML_SPE = "$TextSE|$MarkupSPE";