| | # Overview |
| | |
| | -Relational XPath Map (**rxm**) is a terse database query language to |
| | +Relational eXpression Map (**rxm**) is a terse database query language to |
| | produce structured documents. |
| | - |
| | -While the examples show how to produce an XML document, the same |
| | -mapping could be used to produce any structured format, including JSON. |
| | |
| | # Syntax |
 |
| | |
| | Each line in the mapping consists primarily of a database entity on the left |
| | -and a simple XPath expression on the right. |
| | +and an expression on the right. |
| | |
| | ``` |
|
| | ``` |
| | |
| | -This would produce a document similar to the following: |
| | +The database entity can be a *table name*, a *column name*, or a *table and |
| | +column name*. The expression is an XPath node, an attribute, or a |
| | +*table and column name*. |
| | + |
| | +The above mapping could produce the following: |
| | |
| | ``` |
|
| | </people> |
| | ``` |
| | - |
| | -The database entity can be a *table name*, a *column name*, or a *table and |
| | -column name*. The XPath expression is a node, an attribute, or a *table and |
| | -column name*. |
| | |
| | -Exceptions to the line format take the form of pops and globs. |
| | +Although an XML document is shown, the same mapping could generate any |
| | +structured document format, including JSON. |
| | |
| | ### Pops |
|
| | |
| | The kleene star preceded by a column demarcation (`.`) indicates that all |
| | -columns must be mapped. Each node name corresponds directly to the entity |
| | -column name. Spaces in column names are replaced with underscores. |
| | +columns are mapped automatically. Each node name corresponds directly to |
| | +the entity column name. Spaces in column names are replaced with underscores. |
| | |
| | ## Where |