diff --git a/configure.ac b/configure.ac
index 38341e7..894d369 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-AC_INIT([libisofs], [0.6.14], [http://libburnia-project.org])
+AC_INIT([libisofs], [0.6.15], [http://libburnia-project.org])
 AC_PREREQ([2.50])
 dnl AC_CONFIG_HEADER([config.h])	
 
@@ -44,7 +44,7 @@ dnl If LIBISOFS_*_VERSION changes, be sure to change AC_INIT above to match.
 dnl
 LIBISOFS_MAJOR_VERSION=0
 LIBISOFS_MINOR_VERSION=6
-LIBISOFS_MICRO_VERSION=14
+LIBISOFS_MICRO_VERSION=15
 LIBISOFS_VERSION=$LIBISOFS_MAJOR_VERSION.$LIBISOFS_MINOR_VERSION.$LIBISOFS_MICRO_VERSION
 
 AC_SUBST(LIBISOFS_MAJOR_VERSION)
@@ -54,10 +54,11 @@ AC_SUBST(LIBISOFS_VERSION)
 
 dnl Libtool versioning
 LT_RELEASE=$LIBISOFS_MAJOR_VERSION.$LIBISOFS_MINOR_VERSION
-# SONAME = 16 - 10 = 6 . Library name = libisofs.6.10.0
-LT_CURRENT=16
+# 2009.02.28: development jump has already happened
+# SONAME = 17 - 11 = 6 . Library name = libisofs.6.11.0
+LT_CURRENT=17
 LT_REVISION=0
-LT_AGE=10
+LT_AGE=11
 LT_CURRENT_MINUS_AGE=`expr $LT_CURRENT - $LT_AGE`
 
 AC_SUBST(LT_RELEASE)
diff --git a/doc/susp_aaip_isofs_names.txt b/doc/susp_aaip_isofs_names.txt
index 505f167..37e3cad 100644
--- a/doc/susp_aaip_isofs_names.txt
+++ b/doc/susp_aaip_isofs_names.txt
@@ -22,6 +22,7 @@ Purpose:
 Format of Value:
       DEV_LEN | DEV_BYTES | INO_LEN | INO_BYTES
       The _LEN fields comply to ISO 9660 Format section 7.1.1.
+      The byte strings begin with the most significant byte.
 
 Example:
       Device number 2001, inode number 176343
diff --git a/libisofs/ecma119.c b/libisofs/ecma119.c
index e80441a..bcf3734 100644
--- a/libisofs/ecma119.c
+++ b/libisofs/ecma119.c
@@ -865,7 +865,7 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
 {
     int ret, i, voldesc_size, nwriters;
     Ecma119Image *target;
-    int el_torito_writer_index = -1;
+    int el_torito_writer_index = -1, file_src_writer_index= -1;
 
     /* 1. Allocate target and copy opts there */
     target = calloc(1, sizeof(Ecma119Image));
@@ -1032,6 +1032,7 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
     if (ret < 0) {
         goto target_cleanup;
     }
+    file_src_writer_index = target->nwriters - 1;
 
     /*
      * 3.
@@ -1048,6 +1049,12 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
         if (i == el_torito_writer_index)
     continue;
 #endif
+
+        /* ts A90228 : exposing address of data start to IsoWriteOpts */
+        if (i == file_src_writer_index) {
+            opts->data_start_lba = target->curblock;
+        }
+
         ret = writer->compute_data_blocks(writer);
         if (ret < 0) {
             goto target_cleanup;
@@ -1682,3 +1689,13 @@ int iso_write_opts_set_fifo_size(IsoWriteOpts *opts, size_t fifo_size)
     opts->fifo_size = fifo_size;
     return ISO_SUCCESS;
 }
+
+int iso_write_opts_get_data_start(IsoWriteOpts *opts, uint32_t *data_start,
+                                  int flag)
+{
+    if(opts->data_start_lba == 0)
+	return ISO_ERROR;
+    *data_start = opts->data_start_lba;
+    return ISO_SUCCESS;
+}
+
diff --git a/libisofs/ecma119.h b/libisofs/ecma119.h
index f11c32e..5be1a13 100644
--- a/libisofs/ecma119.h
+++ b/libisofs/ecma119.h
@@ -239,6 +239,16 @@ struct iso_write_opts {
      * buffer.
      */
     size_t fifo_size;
+
+
+    /* ts A90228 : exposing address of data start block to the API */
+    /**
+     * This is not an option setting but a value returned after the options
+     * were used to compute the layout of the image.
+     * It tells the LBA of the first plain file data block in the image.
+     */
+    uint32_t data_start_lba;
+
 };
 
 typedef struct ecma119_image Ecma119Image;
diff --git a/libisofs/libisofs.h b/libisofs/libisofs.h
index 8c40d80..0da48a9 100644
--- a/libisofs/libisofs.h
+++ b/libisofs/libisofs.h
@@ -997,7 +997,7 @@ int iso_lib_is_compatible(int major, int minor, int micro);
  */
 #define iso_lib_header_version_major  0
 #define iso_lib_header_version_minor  6
-#define iso_lib_header_version_micro  14
+#define iso_lib_header_version_micro  15
 
 /**
  * Usage discussion:
@@ -1479,6 +1479,27 @@ int iso_write_opts_set_overwrite_buf(IsoWriteOpts *opts, uint8_t *overwrite);
  */
 int iso_write_opts_set_fifo_size(IsoWriteOpts *opts, size_t fifo_size);
 
+
+/* ts A90228 */
+#define Libisofs_has_iwo_get_data_starT yes
+/**
+ * Inquire the start address of the file data blocks after having used
+ * IsoWriteOpts with iso_image_create_burn_source().
+ * @param opts
+ *        The option set that was used when starting image creation
+ * @param data_start
+ *        Returns the logical block address if it is already valid
+ * @param flag
+ *        Reserved for future usage, set to 0.
+ * @return
+ *        1 indicates valid data_start, <0 indicates invalid data_start
+ *
+ * @since 0.6.16
+ */
+int iso_write_opts_get_data_start(IsoWriteOpts *opts, uint32_t *data_start,
+                                  int flag);
+
+
 /**
  * Create a burn_source and a thread which immediately begins to generate
  * the image. That burn_source can be used with libburn as a data source
@@ -4061,7 +4082,7 @@ void iso_stream_get_id(IsoStream *stream, unsigned int *fs_id, dev_t *dev_id,
  */
 #define ISO_FILE_ERROR                  0xE830FF80
 
-/** Trying to open an already openned file (FAILURE,HIGH, -129) */
+/** Trying to open an already opened file (FAILURE,HIGH, -129) */
 #define ISO_FILE_ALREADY_OPENED         0xE830FF7F
 
 /* @deprecated use ISO_FILE_ALREADY_OPENED instead */