48 lines
2.2 KiB
Markdown
48 lines
2.2 KiB
Markdown
## Contains ODF import and export filter logic.
|
|
|
|
The main library "xo" contains the basic ODF import/export filter
|
|
implementation for most applications. The document is accessed
|
|
via its UNO API, which has the advantage that the same import/export
|
|
code can be used for text in all applications (from/to Writer/EditEngine).
|
|
The filter consumes/produces via SAX UNO API interface (implemented in
|
|
"sax"). Various bits of the ODF filters are also implemented in
|
|
applications, for example [git:sw/source/filter/xml].
|
|
|
|
There is a central list of all element or attribute names in
|
|
[git:include/xmloff/xmltoken.hxx]. The main class of the import filter
|
|
is SvXMLImport, and of the export filter SvXMLExport.
|
|
|
|
The Import filter maintains a stack of contexts for each element being
|
|
read. There are many classes specific to particular elements, derived
|
|
from SvXMLImportContext.
|
|
|
|
Note that for export several different versions of ODF are supported,
|
|
with the default being the latest ODF version with "extensions", which
|
|
means it may contain elements and attributes that are only in drafts of
|
|
the specification or are not yet submitted for specification. Documents
|
|
produced in the other (non-extended) ODF modes are supposed to be
|
|
strictly conforming to the respective specification, i.e., only markup
|
|
defined by the ODF specification is allowed.
|
|
|
|
There is another library "xof" built from the source/transform directory,
|
|
which is the filter for the OpenOffice.org XML format. This legacy format
|
|
is a predecessor of ODF and was the default in OpenOffice.org 1.x versions,
|
|
which did not support ODF. This filter works as a SAX transformation
|
|
from/to ODF, i.e., when importing a document the transform library reads
|
|
the SAX events from the file and generates SAX events that are then
|
|
consumed by the ODF import filter.
|
|
|
|
[OpenOffice.org XML File Format](http://www.openoffice.org/xml/general.html)
|
|
|
|
There is some stuff in the "dtd" directory which is most likely related
|
|
to the OpenOffice.org XML format but is possibly outdated and obsolete.
|
|
|
|
### Add new XML tokens
|
|
|
|
When adding a new XML token, you need to add its entry in the following three
|
|
files:
|
|
|
|
* [git:include/xmloff/xmltoken.hxx]
|
|
* [git:xmloff/source/core/xmltoken.cxx]
|
|
* [git:xmloff/source/token/tokens.txt]
|
|
|