diff --git a/source/detail/custom_value_traits.cpp b/source/detail/custom_value_traits.cpp
index e452d4ab..2bb3933a 100644
--- a/source/detail/custom_value_traits.cpp
+++ b/source/detail/custom_value_traits.cpp
@@ -144,17 +144,17 @@ std::string to_string(border_style style)
 {
     switch (style)
     {
-    case border_style::dashdot: return "dashdot";
-    case border_style::dashdotdot: return "dashdotdot";
+    case border_style::dashdot: return "dashDot";
+    case border_style::dashdotdot: return "dashDotDot";
     case border_style::dashed: return "dashed";
     case border_style::dotted: return "dotted";
     case border_style::double_: return "double";
     case border_style::hair: return "hair";
     case border_style::medium: return "medium";
-    case border_style::mediumdashdot: return "mediumdashdot";
-    case border_style::mediumdashdotdot: return "mediumdashdotdot";
-    case border_style::mediumdashed: return "mediumdashed";
-    case border_style::slantdashdot: return "slantdashdot";
+    case border_style::mediumdashdot: return "mediumDashDot";
+    case border_style::mediumdashdotdot: return "mediumDashDotDot";
+    case border_style::mediumdashed: return "mediumDashed";
+    case border_style::slantdashdot: return "slantDashDot";
     case border_style::thick: return "thick";
     case border_style::thin: return "thin";
     case border_style::none: return "none";
diff --git a/source/detail/custom_value_traits.hpp b/source/detail/custom_value_traits.hpp
index b5433772..7e0fd9e5 100644
--- a/source/detail/custom_value_traits.hpp
+++ b/source/detail/custom_value_traits.hpp
@@ -179,18 +179,18 @@ gradient_fill_type from_string(const std::string &string)
 template<>
 border_style from_string(const std::string &string)
 {
-    if (string == "dashdot") return border_style::dashdot;
-    else if (string == "dashdotdot") return border_style::dashdotdot;
+    if (string == "dashDot") return border_style::dashdot;
+    else if (string == "dashDotDot") return border_style::dashdotdot;
     else if (string == "dashed") return border_style::dashed;
     else if (string == "dotted") return border_style::dotted;
     else if (string == "double") return border_style::double_;
     else if (string == "hair") return border_style::hair;
     else if (string == "medium") return border_style::medium;
-    else if (string == "mediumdashdot") return border_style::mediumdashdot;
-    else if (string == "mediumdashdotdot") return border_style::mediumdashdotdot;
-    else if (string == "mediumdashed") return border_style::mediumdashed;
+    else if (string == "mediumDashdot") return border_style::mediumdashdot;
+    else if (string == "mediumDashDotDot") return border_style::mediumdashdotdot;
+    else if (string == "mediumDashed") return border_style::mediumdashed;
     else if (string == "none") return border_style::none;
-    else if (string == "slantdashdot") return border_style::slantdashdot;
+    else if (string == "slantDashDot") return border_style::slantdashdot;
     else if (string == "thick") return border_style::thick;
     else if (string == "thin") return border_style::thin;
 
diff --git a/source/detail/xlsx_consumer.cpp b/source/detail/xlsx_consumer.cpp
index ff0d224d..d339d1d2 100755
--- a/source/detail/xlsx_consumer.cpp
+++ b/source/detail/xlsx_consumer.cpp
@@ -2453,6 +2453,8 @@ void xlsx_consumer::read_comments(worksheet ws)
     std::vector<std::string> authors;
 
     expect_start_element(qn("spreadsheetml", "comments"), xml::content::complex);
+    // name space can be ignored
+    skip_attribute(qn("mc","Ignorable"));
     expect_start_element(qn("spreadsheetml", "authors"), xml::content::complex);
 
     while (in_element(qn("spreadsheetml", "authors")))
@@ -2478,6 +2480,11 @@ void xlsx_consumer::read_comments(worksheet ws)
         ws.cell(cell_ref).comment(comment(read_rich_text(qn("spreadsheetml", "text")), authors.at(author_id)));
 
         expect_end_element(qn("spreadsheetml", "text"));
+        // specifc name space mc alternateContent element
+        expect_start_element(qn("mc", "AlternateContent"),xml::content::complex);
+        skip_remaining_content(qn("mc", "AlternateContent"));
+        expect_end_element(qn("mc", "AlternateContent"));
+        
         expect_end_element(qn("spreadsheetml", "comment"));
     }