Scalable, schemaless document query model

摘要: Query models for document sets (such as XML documents or records in a relational database) typically involve schema defining the structure of documents. However, rigidly defined schemas often raise difficulties with validation even inconsequential structural variations. Additionally, queries developed against schema-constrained are sensitive to details and variations that not query, resulting inaccurate results development complications, may break upon changes. Instead, query hierarchically structured enable “twig” specifying only nodes relevant (e.g., students student database having sibling named “Lee” teacher “Smith,” irrespective unrelated document). Such more natural development, continued accuracy event