This article shows how to add metadata properties which is the most sophisticated feature of the GroupDocs.Metadata Node.js via Java search engine...Assembly Product Solution GroupDocs...
Extract the metadata properties you need from files of different types with GroupDocs.Metadata for Python via .NET using tags, categories and property attributes....Assembly Product Solution GroupDocs...
The set_properties method updates or adds metadata. Use it to add metadata to photos and PDFs or to update data in MP3 files with GroupDocs.Metadata for Python via .NET....Assembly Product Solution GroupDocs...
The page describes document annotations of different types and how to add annotations to a document using GroupDocs.Annotation API....Assembly Product Solution GroupDocs...