An intangible cultural heritage (ICH) is a practice, representation, expression, knowledge, or skill, as well as the instruments, objects, artifacts, and cultural spaces that are considered by UNESCO to be part of a place's cultural heritage. Intangible cultural heritage is considered by Member States of UNESCO in relation to the tangible World Heritage focusing on intangible aspects of culture. In 2001, UNESCO made a survey among States and NGOs to try to agree on a definition, and the Convention for the Safeguarding of Intangible Cultural Heritage was drafted in 2003 for its protection and promotion. The Convention for the Safeguarding of the Intangible Cultural Heritage defines the intangible cultural heritage as the practices, representations, expressions, as well as the knowledge and skills (including instruments, objects, artifacts, cultural spaces), that communities, groups and, in some cases, individuals recognise as part of their cultural heritage. It is sometimes called living cultural heritage, and is manifested inter alia in the following domains: Cultural heritage in general consists of the products and processes of a culture that are preserved and passed on through the generations. Some of that heritage takes the form of cultural property, formed by tangible artefacts such as buildings or works of art. Many parts of culture, however are intangible, including song, music, dance, drama, skills, cuisine, crafts and festivals. They are forms of culture that can be recorded but cannot be touched or stored in physical form, like in a museum, but only experienced through a vehicle giving expression to it. These cultural vehicles are called 'Human Treasures' by the UN. According to the 2003 Convention for the Safeguarding of the Intangible Cultural Heritage, the intangible cultural heritage (ICH) – or living heritage – is the mainspring of humanity's cultural diversity and its maintenance a guarantee for continuing creativity. It is defined as follows: Intangible cultural heritage is slightly different from the discipline of oral history, the recording, preservation and interpretation of historical information (specifically, oral tradition), based on the personal experiences and opinions of the speaker. ICH attempts to preserve cultural heritage 'with' the people or community by protecting the processes that allow traditions and shared knowledge to be passed on while oral history seeks to collect and preserve historical information obtained from individuals and groups. With sustainable development gaining momentum as a priority of UNESCO heritage policies, an increasing number of food-related nominations are being submitted for inscription on the lists of the Convention for the safeguarding of the intangible cultural heritage. The Mediterranean diet, the traditional Mexican cuisine and the Japanese dietary culture of washoku are just some examples of this booming phenomenon. The UNESCO lists of intangible cultural heritage also include a variety of dance genres, often associated with singing, music and celebrations, from all over the world. The lists include: celebratory and ritual dances such as Ma'di bowl lyre music and dance from Uganda and Kalbelia folk songs and dances of Rajasthan from India, and social dances such as Cuban rumba. Also, some dances are localised and practised mainly in their country of origin, such as Sankirtana, a performing art that includes drumming and singing, from India. Other dance forms, however, even if they are officially recognised as heritage from their country of origin, are practised and enjoyed all over the world. For example, flamenco from Spain and tango, from Argentina and Uruguay, have a very international dimension. Dance is a very complex phenomenon, which involves culture, traditions, the use of human bodies, artefacts (such as costumes and props), as well as a specific use of music, space and sometimes light. As a result, a lot of tangible and intangible elements are combined within dance, making it a challenging but extremely interesting type of heritage to safeguard.