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XmlHarvester

This is an open source tool freely available for anyone to use. The C# source code is also available for anyone to download and configure. This tool extracts discrete data from standard CDA XML files, such as eICR and QRDA files, and stores these data elements in a database. Additionally, the parser is configurable to enable/disable schema (.xsd) and schematron (.sch) validation against provided validation files.

Features

  • Convert XML to MDB
  • Convert XML to XLSX
  • Convert XML to DB2
  • Convert XML to MS SQL Server (work in progress)
  • Specify structure of MDB and XLSX via config
  • Use XPATH to define where data comes from in source XML documents
  • User interface to specify source and destination directories, and review logs
  • Validate XML documents using XML Schema (XSD) and Schematron (SCH)
  • Move processed files to a separate directory
    • Move processed files to valid/invalid directories based on validation

Config

The structure of the MS Access DB and where the data for each table/column comes from in the XML files is defined in a MappingConfig.xml file.

Example:

<config tableName="document">
  <namespace prefix="cda" uri="urn:hl7-org:v3" />
  
  <column name="colName">XPATH</column>
  
  <group tableName="author" columnPrefix="author" contex="XPATH">
    <column name="colName">XPATH</column>
    
    <!-- nested groups -->
  </group>
</config>
Config Property Description
config This is the root element for the entire XML configuration. This represents each XML document processed by the tool.
config.tableName The table in the MDB that should hold document-level information.
config.namespace Namespace definitions that are used to process XPATH. If XPATH includes namespaces, the namespaces should be defined here.
config.column, group.column A column in a table. For config.column, XPATH is in the context of the entire document. For group.column the context is within the context specified for the group.
config.group A table that is related to the document table. Data within this table is based on the data specified within the context attribute.
config.group.group Nested tables, related to the parent table.

Command Line Interface

A CLI is available to run the tool from the command line (or automatically from another process).

The general format of the CLI is as follows:

XmlHarvesterCli.exe <command> [options]

Help can be provided by the CLI tool itself:

XmlHarvesterCli.exe [command] --help

Command: xlsx

Parameter Description
-c, --config Required. The location of the mapping config XML file.
-i, --input Required. The directory that contains the input XML files.
-o, --output Required. The directory where output (XLSX) files should go.
-m, --move The directory to move input files to once they are done being processed.
-x, --xsd The path to an XML Schema (XSD) that should be used to validate the structure of each XMl document processed.
-s, --sch The path to an ISO Schematron (SCH) file that should be used to validate the content of each XMl document processed.

Command: mdb

Parameter Description
-c, --config Required. The location of the mapping config XML file.
-i, --input Required. The directory that contains the input XML files.
-o, --output Required. The directory where output (MDB) files should go.
-m, --move The directory to move input files to once they are done being processed.
-x, --xsd The path to an XML Schema (XSD) that should be used to validate the structure of each XMl document processed.
-s, --sch The path to an ISO Schematron (SCH) file that should be used to validate the content of each XMl document processed.

Command: mssql

Parameter Description
-c, --config Required. The location of the mapping config XML file.
-i, --input Required. The directory that contains the input XML files.
-u, --username Required. The authenticated username to access the DB.
-p, --password Required. The authenticated password to access the DB.
-v, --server (Default: localhost) The name of the sql server.
-d, --database (Default: harvester) The name of the database to convert/output to.
-m, --move The directory to move input files to once they are done being processed.
-x, --xsd The path to an XML Schema (XSD) that should be used to validate the structure of each XMl document processed.
-s, --sch The path to an ISO Schematron (SCH) file that should be used to validate the content of each XMl document processed.

Command: db2

Parameter Description
-c, --config Required. The location of the mapping config XML file.
-i, --input Required. The directory that contains the input XML files.
-u, --username Required. The authenticated username to access the DB.
-p, --password Required. The authenticated password to access the DB.
-d, --database (Default: xdc) The name of the database to convert/output to.
-m, --move The directory to move input files to once they are done being processed.
-x, --xsd The path to an XML Schema (XSD) that should be used to validate the structure of each XMl document processed.
-s, --sch The path to an ISO Schematron (SCH) file that should be used to validate the content of each XMl document processed.

DB2 Conversion

Pre-requisites

To convert to a DB2 database, the machine that executes the XmlHarvester must have the IBM Data Server Runtime Client installed as a dependency. In addition to installing the runtime client, it must be configured to describe the database you want to export to. In the below example, "xdc" is the database that is being used for conversion.

Example db2dsdriver.cfg

<configuration>
   <!-- Multi-line comments are not supported -->
   <dsncollection>
      <dsn alias="dock" name="docker" description="alias1_description" host="localhost" port="50000"/>
   </dsncollection>
   <databases>
      <database name="xdc" host="localhost" port="50000">
         <parameter name="CurrentSchema" value="xdc"/>
         <wlb>
            <parameter name="enableWLB" value="true"/>
            <parameter name="maxTransports" value="50"/>
         </wlb>
         <acr>
            <parameter name="enableACR" value="true"/>
         </acr>
         <specialregisters>
            <parameter name="CURRENT DEGREE" value="'ANY'"/>
         </specialregisters>
      </database>
   </databases>
</configuration>

Running

To output/convert to a DB2 database, specify the named database in the "Database to connect to" field, as well as the username and password of the user. The name of the database should match the name in the db2dsdriver.cfg file (ex: "xdc" in the above example).

When conversion begins, it will first check to ensure that the DB2 database has the schema as described by the mapping configuration. If a table already exists and the columns do not align with the mapping config, an error will be produced. If the table does not already exist, it will be automatically created by the XmlHarvester tool.

Thanks to...

@markarnott for creating the SQL server integration

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Converts multiple XML documents into a MDB (Microsoft Access) database whose structure is defined by config.

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