Changes for February 2008
List of the key changes made for the February 2008 major release of the ome-xml data model.
The new major release of the schema has a new namespace and all version numbers are reset to 1. As a major release, any file that validated correctly using the last major release will probably not validate correctly using this new release. Some files that failed to validate before will now be valid. It is important to update any file readers and writers to understand the changes.
The version number of all schema files is now 1.
This schema uses the new namespace:
For the OME schema
and the schema file is located at
Overview of changes
Description element has become a string type. Description is not the
correct place for an XML sub-document. It has also an optional reference
XML:lang that allows the language the Description is written in to be
Description has been removed for
AnalysisModule. It is now using the
version defined in
UniversallyUniqueIdentifier for files (ome.xsd)
To add support for splitting data across multiple OME-TIFF files in a
way that will survive file renaming, each file now has a unique
identifier. This is a
UUID attribute on the
OME node. It is normally
optional but is required if you wish to use multi-part files.
Multi-part OME-TIFF file support (ome.xsd)
A TiffData block can now contain a
UUID element that specifies the file
to look in for the tiff image data. The
UUID element also has an
FileName to point to the name for the file containing
the correct data. The
UUID is required and the
FileName is strongly
recommended. A reader should first open the file pointed to by
If it does not contain the correct
UUID then the reader can either fail
or search the current folder for a file that does contain the correct
UUID. This allows multi-part files to survive renaming.
Removal of Power attributes from Arc and Filament (ome.xsd)
Power was moved into
LightSource in the 2007-06 V1 release, this
attribute was no longer needed in element
Power attributes should have been removed at the time. Any data can be
moved to the
Immersion have been bundled into elements of
the same name. They were only used once in the schema. This should not
affect instance documents, only any schema derived from
Clarification of PixelTypes (ome.xsd)
PixelTypes has been split into two. It now has
ExtendedPixelTypes. It was being used in two different ways in previous
schemas, once in
Pixels and once in
AcquiredPixelsRef to AcquiredPixels (ome.xsd)
AcquiredPixelsRef has become attribute
This has been changed to make
AcquiredPixels consistent with the
DefaultPixels attribute in the
Image element. Now both are a
Hash of Plane data (ome.xsd)
There is now the option to store a SHA1 hash of a plane’s image data.
This can be used to detect modification. It is stored as a
element inside each
Plane. At present this is the only supported hashing
method. Others may be added in future releases.
Files with no significant changes
The following files have no significant changes from the last version released:
SPW.xsd has had an import of
AnalysisModule.xsd removed. This import was spurious as it
was not used in the file.