concept document store in category nosql

This is an excerpt from Manning's book Making Sense of NoSQL. Login to get full access to this book.

It’s more than rows in tables —NoSQL systems store and retrieve data from many formats: key-value stores, graph databases, column-family (Bigtable) stores, document stores, and even rows in tables.

Figure 4.21. Document stores use a tree structure that begins with a root node, and have subbranches that can also contain sub-branches. The actual data values are usually stored at the leaf levels of a tree.

9.3. Using document stores to avoid object-relational mapping

You may be familiar with the saying “A clever person solves a problem. A wise person avoids it.” Organizations that adopt document stores to avoid an object-relational layer are wise indeed. The conversion of object hierarchies to and from rigid tabular structures can be one of most vexing problems in building applications. Avoiding the object-relational layer mapping is a primary reason developer productivity increases when using NoSQL systems.