Online travel portals development is a business in boom nowadays. Earlier the vast travel industry was not managed; the invasion of API integration has brought everything in one platform. The concept of XML aids travel portals to display the product information at various platforms in the easiest way. The XML format is not only being in travel industry, finance and insurance industry have already gone through the development and are doing better in this as well. The format is developed and successfully implied on all the other industries because the server in the value chain is capable of validating a document and then parse it to the tool available. But, the things are not as simple as they are considered to be. Consuming and responding to XML documents is not easy because it provides complex information. It is possible with XML technology that a travel portal can present a complete and detailed travel itinerary.Web distribution channel has raised the complexity of travel industry.There are many developments in the field that are providing more and more options for the travelers to get the best deal in their traveling itinerary. The travel booking process which earlier followed the Global Distribution System which was provided by the traditional travel industries are now switching to OTA’s, metasearch and suppliers directly. As there are many options and choices in front of the travelers they research more and more before making a final booking for their itinerary. They move in and around several websites and devices in order to get the best value for their travel itinerary. It is XML technology that reads and understands the desires of the travelers and decodes it so that it may conclude to a fruitful result. Online reservation system, hotels and flights are integrated in the best way through the API integration which is a result of XML technology. So for a travel portal development both API integration and XML technology is useful tool. XML technology aids the travel portals to read and understand the different searches made by the travelers in order to book flights, hotels, cruise and other related services. Article Source: https://medium.com/@Ranjantps01/what-is-xml-in-travel-portals-424d39e345ae#.xkdlfjdro