def pyang_plugin_init():
    """Called by pyang plugin framework at to initialize the plugin."""

    # Register the plugin
    plugin.register_plugin(RESTCONFPlugin())

    # Register that we handle extensions from the YANG module 'ietf-restconf'
    grammar.register_extension_module(restconf_module_name)

    yd = (restconf_module_name, 'yang-data')
    statements.add_data_keyword(yd)
    statements.add_keyword_with_children(yd)
    statements.add_keywords_with_no_explicit_config(yd)

    # Register the special grammar
    for (stmt, occurance, (arg, rules), add_to_stmts) in restconf_stmts:
        grammar.add_stmt((restconf_module_name, stmt), (arg, rules))
        grammar.add_to_stmts_rules(add_to_stmts,
                                   [((restconf_module_name, stmt), occurance)])

    # Add validation functions
    statements.add_validation_fun('expand_2',
                                  [yd],
                                  v_yang_data)

    # Register special error codes
    error.add_error_code('RESTCONF_YANG_DATA_CHILD', 1,
                         "the 'yang-data' extension must have exactly one " +
                         "child that is a container")

def pyang_plugin_init():
    """Called by pyang plugin framework at to initialize the plugin."""

    # Register the plugin
    plugin.register_plugin(SMIPlugin())
    
    # Add our special argument syntax checker
    syntax.add_arg_type('smi-oid', _chk_smi_oid)

    # Register that we handle extensions from the YANG module 'smi' 
    grammar.register_extension_module(smi_module_name)

    # Register the special grammar
    for (stmt, occurance, (arg, rules), add_to_stmts) in smi_stmts:
        grammar.add_stmt((smi_module_name, stmt), (arg, rules))
        grammar.add_to_stmts_rules(add_to_stmts,
                                   [((smi_module_name, stmt), occurance)])

    # Add validation step
    statements.add_validation_fun('type',
                                  [(smi_module_name, 'oid')],
                                  v_parse_oid)
    statements.add_validation_phase('smi_set_oid', after='inherit_properties')
    statements.add_validation_fun('smi_set_oid',
                                  ['module', 'submodule'],
                                  v_set_oid)

def pyang_plugin_init():
    """Called by pyang plugin framework at to initialize the plugin."""

    # Register the plugin
    plugin.register_plugin(SMIPlugin())

    # Add our special argument syntax checkers
    syntax.add_arg_type("smi-oid", _chk_smi_oid)
    syntax.add_arg_type("smi-max-access", _chk_smi_max_access)

    # Register that we handle extensions from the YANG module 'ietf-yang-smiv2'
    grammar.register_extension_module(smi_module_name)

    # Register the special grammar
    for (stmt, occurance, (arg, rules), add_to_stmts) in smi_stmts:
        grammar.add_stmt((smi_module_name, stmt), (arg, rules))
        grammar.add_to_stmts_rules(add_to_stmts, [((smi_module_name, stmt), occurance)])

    # Add validation step
    statements.add_validation_phase("smi_set_oid", after="inherit_properties")
    statements.add_validation_fun("smi_set_oid", [(smi_module_name, "oid")], v_set_oid)
    statements.add_validation_fun("smi_set_oid", [(smi_module_name, "subid")], v_set_subid)

    # Register special error codes
    error.add_error_code("SMIv2_BAD_SUBID", 1, "subid needs an oid or subid statement in an ancestor")
    error.add_error_code("SMIv2_SUBID_AND_OID", 1, "subid and oid cannot be given at the same time")

def pyang_plugin_init():
    """Called by pyang plugin framework at to initialize the plugin."""

    # Register the plugin
    plugin.register_plugin(MDPlugin())

    # Register that we handle extensions from the YANG module
    # 'ietf-yang-metadata'
    grammar.register_extension_module(md_module_name)

    # Register the special grammar
    for (stmt, occurance, (arg, rules), add_to_stmts) in md_stmts:
        grammar.add_stmt((md_module_name, stmt), (arg, rules))
        grammar.add_to_stmts_rules(add_to_stmts,
                                   [((md_module_name, stmt), occurance)])

def pyang_plugin_init():
    plugin.register_plugin(CxmlPlugin())

def pyang_plugin_init():
    plugin.register_plugin(TreePlugin())

def pyang_plugin_init():
    plugin.register_plugin(IETFPlugin())

def pyang_plugin_init():
    plugin.register_plugin(JtoXPlugin())

def pyang_plugin_init():
    plugin.register_plugin(ModuleCatalogPlugin())

def pyang_plugin_init():
    plugin.register_plugin(PuppetPlugin())

def pyang_plugin_init():
    plugin.register_plugin(JsonXslPlugin())

def pyang_plugin_init():
    plugin.register_plugin(YANGXMLPlugin())

def pyang_plugin_init():
    plugin.register_plugin(SwaggerPlugin())

def pyang_plugin_init():
    plugin.register_plugin(LintPlugin())

def pyang_plugin_init():
    plugin.register_plugin(ModDescPlugin())

def pyang_plugin_init():
    plugin.register_plugin(DocsPlugin())

def pyang_plugin_init():
    plugin.register_plugin(SidPlugin())

def pyang_plugin_init():
    plugin.register_plugin(WYINPlugin())

def pyang_plugin_init():
    plugin.register_plugin(CheckUpdatePlugin())

def pyang_plugin_init():
    plugin.register_plugin(IetfModelPlugin())