Recent surveys in Myanmar, Thailand and Vietnam reveal that substantial proportions of persons aged 60 and older co-reside with grandchildren and commonly provide grandparental care. Usually the grandchildren's parents are also present. Situations in which the grandchildren's parents are absent are considerably less frequent. Parents are commonly the main source of the grandchildren's financial support even if absent. Most grandparents that provide care do not consider it a serious burden even when the grandchild's parents are absent. Moreover, grandparental care is not always one-directional as grandchildren can also be of help to grandparents. These features of grandchild care reflect a regional cultural context that views acceptance of reciprocal intergenerational obligations as normal and in which co-residence of older persons and adult children is still common. Differences in economic development and past fertility trends account for much of the observed differences in grandparental care among the three countries by affecting grandchildren availability and migration of adult children. In addition, economic development and demographic trends will continue to shape grandparental care in the coming decades. Despite the lack of attention to development and demographic context in previous studies, these aspects of the changing societal context deserve a prominent place within conceptual frameworks guiding comparative research on grandparenting.

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Legal ontologies play a key role in various legal applications and have been broadly used by many stakeholders. Innovative systems and ontologies in the law hold potential to conduct legal research. With the needs for legal information management in smart applications, especially for Vietnamese law, it is vitally important to construct core legal ontologies for knowledge representation. This study proposes a core ontology for Vietnamese legal documents which covers general legal domain called as ViLO. The ViLO ontology mainly consists of related institutions of Vietnamese political system, types and structures of legal documents. The method of the NeOn-based collaborations among domain experts and ontology engineers was conducted to build up the ViLO ontology. Through FOCA-based validation results, the proposed method was shown to be effective and efficient. The resulting ontology was demonstrated to be reliable and enriched. The ViLO ontology is supposed to be a basis for further constructions of domain ontologies and artificial intelligence applications in Vietnamese law.