Connector Punctuation and Overlines

Unicode has a Pc category into which it assigns various low lines:

_ U+005F LOW LINE
‿ U+203F UNDERTIE
⁀ U+2040 CHARACTER TIE
⁔ U+2054 INVERTED UNDERTIE
︳ U+FE33 PRESENTATION FORM FOR VERTICAL LOW LINE
︴ U+FE34 PRESENTATION FORM FOR VERTICAL WAVY LOW LINE
﹍ U+FE4D DASHED LOW LINE
﹎ U+FE4E CENTRELINE LOW LINE
﹏ U+FE4F WAVY LOW LINE
＿ U+FF3F FULLWIDTH LOW LINE

However, the overlines that are almost exactly the same thing, are categorized as Po:

‾ U+203E OVERLINE
﹉ U+FE49 DASHED OVERLINE
﹊ U+FE4A CENTRELINE OVERLINE
﹋ U+FE4B WAVY OVERLINE
﹌ U+FE4C DOUBLE WAVY OVERLINE

Is this a bug or a feature? :) Shouldn't they be Pc?

~fantasai
Received on Tue Mar 06 2012 - 22:32:12 CST