Add services to get/set document core properties.

[ylussaud]

Core properties can be accessed using:

XWPFDocument.getProperties().getCoreProperties()

Possible services, we might not need all of them:

• setCategory(String)
• setContentStatus(String)
• setContentType(String)
• setCreated(String)
• setCreated(Optional)
• setCreator(String)
• setDescription(String)
• setIdentifier(String)
• setKeywords(String)
• setLastModifiedByUser(String)
• setLastPrinted(String)
• setLastPrinted(Optional)
• setModified(String)
• setModified(Optional)
• setRevision(String)
• setSubjectProperty(String)
• setTitle(String)
• setVersion(String)

[jmauersberger]

Very good idea. Just a minor thing: What about tags? There seems to be a field in Word for that.

[ylussaud]

maybe setKeywords() ? I didn't have a look on specific details yet.

[jmauersberger]

Seems like POIXMLProperties indeed has the functions you mentioned in your service, so seems you are right with keywords == tags. Just as an extension: may some getter properties from ExtendedProperties may make sense as well like getHyperlinkBase() or getManager(). Anyway, all minor...

[ylussaud]

Yes, that's a good idea.