Grey literature in the internet era; Focusing on change in the definition of grey literature and Pisa Declaration on policy development for grey literature resources

Ikeda, Kiyoshi

In this article, the author introduces the definition of grey literature based on discussed by the International Conference on Grey Literature and the Pisa Declaration on Policy Development for Grey Literature Resources ("Pisa Declaration"). After this, in relation to the definition of grey literature, the current status and issues of grey literature in the digital are described. Finally, the article introduces current trends on grey literature, particularly the Pisa Declaration in 2014.