Apteryx-XML

An Apteryx database schema defined in XML

Requires

apteryx glib-2.0 libxml2 jansson lua cunit pyang xsltproc

Building

make
make test
make install

Schema definition

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
  targetNamespace="https://github.com/alliedtelesis/apteryx"
  xmlns="https://github.com/alliedtelesis/apteryx"
  elementFormDefault="qualified">
  <xs:element name="VALUE">
    <xs:complexType>
      <xs:attribute name="name" type="xs:string" use="required" />
      <xs:attribute name="value" type="xs:string" use="required" />
      <xs:attribute name="help" type="xs:string" use="optional" />
    </xs:complexType>
  </xs:element>
  <xs:element name="PROVIDE">
  </xs:element>
  <xs:element name="INDEX">
  </xs:element>
  <xs:element name="WATCH">
  </xs:element>
  <xs:element name="NODE">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="NODE" minOccurs="0" maxOccurs="unbounded" />
        <xs:element ref="VALUE" minOccurs="0" maxOccurs="unbounded" />
        <xs:element ref="WATCH" minOccurs="0" maxOccurs="1" />
        <xs:element ref="PROVIDE" minOccurs="0" maxOccurs="1" />
        <xs:element ref="INDEX" minOccurs="0" maxOccurs="1" />
      </xs:sequence>
      <xs:attribute name="name" type="xs:string" use="required" />
      <xs:attribute name="default" type="xs:string" use="optional" />
      <xs:attribute name="pattern" type="xs:string" use="optional" />
      <xs:attribute name="help" type="xs:string" use="optional" />
      <xs:attribute name="mode" use="optional">
        <xs:simpleType>
          <xs:restriction base="xs:string">
            <xs:pattern value="(p|x|hx|[rhwc]{1,4})"/>
          </xs:restriction>
        </xs:simpleType>
      </xs:attribute>
    </xs:complexType>
  </xs:element>
  <xs:element name="SCRIPT">
  </xs:element>
  <xs:element name="MODULE">
    <xs:complexType>
      <xs:sequence>
        <xs:element ref="SCRIPT" minOccurs="0" maxOccurs="unbounded"/>
        <xs:element ref="NODE" minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
  </xs:schema>

Example

<?xml version="1.0" encoding="UTF-8"?>
<MODULE xmlns="https://github.com/alliedtelesis/apteryx"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="https://github.com/alliedtelesis/apteryx
    https://github.com/alliedtelesis/apteryx/releases/download/v2.10/apteryx.xsd">
    <NODE name="test" help="this is a test node">
        <NODE name="debug" mode="rw" default="0" help="Debug configuration" pattern="^(0|1)$">
            <VALUE name="disable" value="0" help="Debugging is disabled" />
            <VALUE name="enable" value="1" help="Debugging is enabled" />
        </NODE>
        <NODE name="list" help="this is a list of stuff">
            <NODE name="*" help="the list item">
                <NODE name="name" mode="rw" help="this is the list key"/>
                <NODE name="type" mode="rw" default="1" help="this is the list type">
                    <VALUE name="big" value="1"/>
                    <VALUE name="little" value="2"/>
                </NODE>
                <NODE name="sub-list" help="this is a list of stuff attached to a list">
                    <NODE name="*" help="the sublist item">
                        <NODE name="i-d" mode="rw" help="this is the sublist key"/>
                    </NODE>
                </NODE>
            </NODE>
        </NODE>
        <NODE name="trivial-list" help="this is a simple list of stuff">
            <NODE name="*" help="the list item" />
        </NODE>
    </NODE>
</MODULE>

Lua library

Set/Get

api = require('apteryx-xml').api('/PATH/TO/SCHEMA/')
api.test.debug = 'enable'
assert(api.test.debug == 'enable')
api.test.debug = nil
assert(api.test.debug == 'disable')

Lists

api = require('apteryx-xml').api('/PATH/TO/SCHEMA/')
api.test.list('cat-nip').sub_list('dog').i_d = '1'
assert(api.test.list('cat-nip').sub_list('dog').i_d == '1')
api.test.list('cat-nip').sub_list('dog').i_d = nil
assert(api.test.list('cat-nip').sub_list('dog').i_d == nil)

Search

api = require('apteryx-xml').api('/PATH/TO/SCHEMA/')
api.test.list('cat-nip').sub_list('dog').i_d = '1'
api.test.list('cat-nip').sub_list('cat').i_d = '2'
api.test.list('cat-nip').sub_list('mouse').i_d = '3'
api.test.list('cat_nip').sub_list('bat').i_d = '4'
api.test.list('cat_nip').sub_list('frog').i_d = '5'
api.test.list('cat_nip').sub_list('horse').i_d = '6'
cats1 = api.test.list('cat-nip').sub_list()
assert(#cats1 == 3)
cats2 = api.test.list('cat_nip').sub_list()
assert(#cats2 == 3)
api.test.list('cat-nip').sub_list('dog').i_d = nil
api.test.list('cat-nip').sub_list('cat').i_d = nil
api.test.list('cat-nip').sub_list('mouse').i_d = nil
api.test.list('cat_nip').sub_list('bat').i_d = nil
api.test.list('cat_nip').sub_list('frog').i_d = nil
api.test.list('cat_nip').sub_list('horse').i_d = nil

Conversion between other formats

Generate paths in C header file format

./xml2c <module>.xml

Convert between YANG and Apteryx-XML

• YANG enumerations assume an implcicit pattern, so patterns on Apteryx-XML enumerations are discarded
• YANG leaf-lists are subtly different to Apteryx-XML simple lists in that there is no name/value pair
• YANG has no concept of visibility, so mode=h becomes mode=r
• Apteryx-XML does not support range (all checking is via regex patterns)

From YANG to Apteryx-XML

pyang --plugindir . -f apteryx-xml <module>.yang

From YANG to C header file format

pyang --plugindir . -f cpaths <module>.yang

From Apteryx-XML to YANG

xsltproc --stringparam prefix <module> xml2yin.xsl <module>.xml | pyang -f yang