See the File Versioning Rules. To specify a companion file, the primary key of the companion parent in the File table must be authored into the Version column of the record for the companion. In the following example, FileA is the companion parent and FileB is the companion file. File Table (partial) In this example, the installation state of FileB depends on the File Versioning Rules and the versioning information for FileA.
Machu Picchu was built around 1450, at the height of the Inca Empire. Its construction appears to date to the period of the two great Inca rulers, Pachacutec Inca Yupanqui (1438â71) and TÃºpac Inca Yupanqui (1472â93). It was abandoned just over 100 years later, in 1572, as a belated result of the Spanish Conquest.
It is situated on a mountain ridge above the Sacred Valley which is 80 kilometres (50 mi) northwest of Cuzco and through which the Urubamba River flows. Most archaeologists believe that Machu Picchu was built as an estate for the Inca emperor Pachacuti (1438â1472).achu Picchu is situated above a bow of the Urubamba River, which surrounds the site on three sides, with cliffs dropping vertically for 450 metres (1,480 ft) to the river at their base. The area is subject to morning mists rising from the river.