4: Configuration Using Xml; Xml Configuration Record Document Type Definition; Figure 4-4 Dtd For Xcrs - Lantronix SGX 5150 Command Reference Manual

4: Configuration Using XML
The SGX 5150 IoT device gateway provides an XML interface that you can use to configure SGX
5150 IoT device gateways. Every configuration setting that can be issued from the gateway's Web
Manager interface and CLI can be specified using XML.
The SGX 5150 IoT device gateway can import and export configuration settings as an XML
document known as an XML Configuration Record (XCR). An XCR can be imported or exported
via the CLI, a Web browser, or FTP. An XCR can contain many configuration settings or just a few.
For example, it might change all of the configurable parameters for a SGX 5150 IoT device
gateway, or it may only change the baud rate for a single serial line. Using XCRs is a
straightforward and flexible way to manage the configuration of multiple SGX 5150 IoT device
gateways.

XML Configuration Record Document Type Definition

An XML document type definition (DTD) is a description of the structure and content of an XML
document. It verifies that a document is valid. XCRs are exported using the DTD as shown in
Figure 4-4 DTD for
<!DOCTYPE configrecord [
<!ELEMENT configrecord (configgroup+)>
<!ELEMENT configgroup (configitem+,configgroup*)>
<!ELEMENT configitem (value+)>
<!ELEMENT value (#PCDATA)>
<!ATTLIST configrecord version CDATA #IMPLIED>
<!ATTLIST configgroup name CDATA #IMPLIED>
<!ATTLIST configgroup instance CDATA #IMPLIED>
<!ATTLIST configitem name CDATA #IMPLIED>
<!ATTLIST value name CDATA #IMPLIED>
]>
The SGX 5150 DTD rules state the following:
The XML document element is a <configrecord> element. This is the root element.

A <configrecord> must have one or more <configgroup> elements and can have a

version attribute.
A <configgroup> must have one or more <configitem> elements and can have name

and instance attributes.
A <configitem> element must have one or more <value> elements and can have a name

attribute.
A <value> element can have only data and can have a name attribute.

The name attribute identifies a group, item, or value. It is always a quoted string.

The instance attribute identifies the specific option, like the serial port number. The "instance"

attribute is always a quoted string.
SGX TM 5150 IoT Device Gateway Command Reference
XCRs.

Figure 4-4 DTD for XCRs

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