b3b06d3e7d
Until now the references to the `doctrine-mapping.xsd` consisted of different URLs. A grep of docs showed: * /Users/robo/dev/php/Doctrine/doctrine-mapping.xsd * http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd * http://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd * https://raw.github.com/doctrine/doctrine2/master/doctrine-mapping.xsd Now it is used http://doctrine-project.org/schemas/orm/doctrine-mapping.xsd everywhere.
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Doctrine 2 is an object-relational mapper (ORM) for PHP 7.1+ that provides transparent persistence for PHP objects. It sits on top of a powerful database abstraction layer (DBAL). One of its key features is the option to write database queries in a proprietary object oriented SQL dialect called Doctrine Query Language (DQL), inspired by Hibernate's HQL. This provides developers with a powerful alternative to SQL that maintains flexibility without requiring unnecessary code duplication.