package model type Article struct { EntryBase meta ArticleMetaData } type ArticleMetaData struct { Title string `owl:"inputType=text"` Content string `owl:"inputType=text widget=textarea"` } func (e *Article) Content() EntryContent { return EntryContent(e.meta.Content) } func (e *Article) MetaData() interface{} { return &e.meta } func (e *Article) SetMetaData(metaData interface{}) { e.meta = *metaData.(*ArticleMetaData) }