Wb build export fix and doc

src/wbl/pwrb/src/pwrb_c_buildcopy.wb_load

@@ -83,6 +83,9 @@ SObject pwrb:Class
       !/**
       ! Target file specification.
       ! Only the path need to be specified.
+      !
+      ! If files should be copied to several directories, Target can contain 
+      ! a list separated by comma, eg '$pwrp_exe, $pwrp_web'
       !*/
       Object Target $Attribute 2 
         Body SysBody

src/wbl/pwrb/src/pwrb_c_builddirectory.wb_load

@@ -74,6 +74,8 @@ SObject pwrb:Class
       ! Options.
       ! - BuildBeforeNode, directory is automatically built before any 
       !   node is built.
+      ! - BuildAfterNode, directory is automatically built after any 
+      !   node is built.
       !*/
       Object Options $Attribute 2 
         Body SysBody

src/wbl/pwrb/src/pwrb_c_export.wb_load

@@ -105,6 +105,8 @@ SObject pwrb:Class
       ! Options.
       ! - BuildAfterNode, export is automatically built before any 
       !   node is built.
+      ! - BuildBeforeNode, directory is automatically built before any 
+      !   node is built.
       !*/
       Object Options $Attribute 4 
         Body SysBody

src/wbl/pwrb/src/pwrb_c_import.wb_load

@@ -104,6 +104,8 @@ SObject pwrb:Class
       ! Options.
       ! - BuildBeforeNode, directory is automatically built before any 
       !   node is built.
+      ! - BuildAfterNode, directory is automatically built after any 
+      !   node is built.
       !*/
       Object Options $Attribute 4 
         Body SysBody

src/wbl/pwrb/src/pwrb_td_buildexportmask.wb_load

@@ -47,22 +47,22 @@ SObject pwrb:Type
       Attr PgmName = "BuildExportMask"
     EndBody
     !/**
-    !  Export is automatically built after a node is built.
+    !  Export is automatically built before a node is built.
     !*/
-    Object BuildAfterNode $Bit
+    Object BuildBeforeNode $Bit
      Body SysBody
-       Attr PgmName = "BuildAfterNode"
-       Attr Text = "BuildAfterNode"
+       Attr PgmName = "BuildBeforeNode"
+       Attr Text = "BuildBeforeNode"
        Attr Value = 1
      EndBody
     EndObject
     !/**
-    !  Export is automatically built before a node is built.
+    !  Export is automatically built after a node is built.
     !*/
-    Object BuildBeforeNode $Bit
+    Object BuildAfterNode $Bit
      Body SysBody
-       Attr PgmName = "BuildBeforeNode"
-       Attr Text = "BuildBeforeNode"
+       Attr PgmName = "BuildAfterNode"
+       Attr Text = "BuildAfterNode"
        Attr Value = 2
      EndBody
     EndObject