https://github.com/randym/axlsx/issues/21

fixed 'properly' but I've feeling the schema folder should actually be
 lib/axlsx/schema

instead of 

 lib/schema

2 files changed, 10 insertions, 7 deletions

diff --git a/lib/axlsx/package.rb b/lib/axlsx/package.rb
index a096bbc6..b725c0c7 100644
--- a/lib/axlsx/package.rb
+++ b/lib/axlsx/package.rb
@@ -157,7 +157,7 @@ module Axlsx
     # @return [Array] An array of all validation errors encountered.
     # @private
     def validate_single_doc(schema, doc)
-      schema = Nokogiri::XML::Schema(File.open(File.dirname(__FILE__)+schema))
+      schema = Nokogiri::XML::Schema(File.open(schema))
       doc = Nokogiri::XML(doc)
 
       errors = []
diff --git a/lib/axlsx/util/constants.rb b/lib/axlsx/util/constants.rb
index d7bb8524..5ca17a93 100644
--- a/lib/axlsx/util/constants.rb
+++ b/lib/axlsx/util/constants.rb
@@ -169,23 +169,26 @@ module Axlsx
   # chart part
   IMAGE_PN = "media/image%d.%s"
 
+  # location of schema files for validation
+  SCHEMA_BASE = File.dirname(__FILE__)+'/../../schema/'
+
   # App validation schema
-  APP_XSD = "/../schema/shared-documentPropertiesExtended.xsd"
+  APP_XSD = SCHEMA_BASE + "shared-documentPropertiesExtended.xsd"
 
   # core validation schema
-  CORE_XSD = "/../schema/opc-coreProperties.xsd"
+  CORE_XSD = SCHEMA_BASE + "opc-coreProperties.xsd"
 
   # content types validation schema
-  CONTENT_TYPES_XSD = "/../schema/opc-contentTypes.xsd"
+  CONTENT_TYPES_XSD = SCHEMA_BASE + "opc-contentTypes.xsd"
 
   # rels validation schema
-  RELS_XSD = "/../schema/opc-relationships.xsd"
+  RELS_XSD = SCHEMA_BASE + "opc-relationships.xsd"
 
   # spreadsheetML validation schema
-  SML_XSD = "/../schema/sml.xsd"
+  SML_XSD = SCHEMA_BASE + "sml.xsd"
   
   # drawing validation schema
-  DRAWING_XSD = "/../schema/dml-spreadsheetDrawing.xsd"
+  DRAWING_XSD = SCHEMA_BASE + "dml-spreadsheetDrawing.xsd"
 
   # number format id for pecentage formatting using the default formatting id.
   NUM_FMT_PERCENT = 9