View Source xmerl_eventp (xmerl v2.1)

Simple event-based processors (front-ends to xmerl_scan).

Implements processing XML documents in streams for parsing in SAX style.

Each front-end contains more elaborate settings of xmerl_scan that makes usage of the customization functions.

Summary

Types

Options allow to customize the behaviour of the scanner. See also the "Customization functions" tutorial.

Record #xmlElement{}

Functions

Parse file containing an XML document, SAX style.

Parse file containing an XML document as a stream, DOM style.

Parse file containing an XML document as a stream, SAX style.

Parse file containing an XML document, SAX style.

Types

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option_list()

View Source (not exported)
-type option_list() :: [{atom(), term()} | {atom(), fun(), term()} | {atom(), fun(), fun(), term()}].

Options allow to customize the behaviour of the scanner. See also the "Customization functions" tutorial.

Possible options are:

{acc_fun, Fun}
Call back function to accumulate contents of entity.
{continuation_fun, Fun} | {continuation_fun, Fun, ContinuationState}
Call back function to decide what to do if the scanner runs into EOF before the document is complete.
{event_fun, Fun} | {event_fun, Fun, EventState}
Call back function to handle scanner events.
{fetch_fun, Fun} | {fetch_fun, Fun, FetchState}
Call back function to fetch an external resource.
{hook_fun, Fun} | {hook_fun, Fun, HookState}
Call back function to process the document entities once identified.
{close_fun, Fun}
Called when document has been completely parsed.
{rules, ReadFun, WriteFun, RulesState} | {rules, Rules}
Handles storing of scanner information when parsing.
{user_state, UserState}
Global state variable accessible from all customization functions
{fetch_path, PathList}
PathList is a list of directories to search when fetching files. If the file in question is not in the fetch_path, the URI will be used as a file name.
{space, Flag}
preserve (default) to preserve spaces, normalize to accumulate consecutive whitespace and replace it with one space.
{line, Line}
To specify starting line for scanning in document which contains fragments of XML.
{namespace_conformant, Flag}
Controls whether to behave as a namespace conformant XML parser, false (default) to not otherwise true.
{validation, Flag}
Controls whether to process as a validating XML parser: off (default) no validation, or validation dtd by DTD or schema by XML Schema. false and true options are obsolete (i.e. they may be removed in a future release), if used false equals off and true equals dtd.
{schemaLocation, [{Namespace,Link}|...]}
Tells explicitly which XML Schema documents to use to validate the XML document. Used together with the {validation,schema} option.
{quiet, Flag}
Set to true if Xmerl should behave quietly and not output any information to standard output (default false).
{doctype_DTD, DTD}
Allows to specify DTD name when it isn't available in the XML document. This option has effect only together with {validation,dtd option.
{xmlbase, Dir}
XML Base directory. If using string/1 default is current directory. If using file/1 default is directory of given file.
{encoding, Enc}
Set default character set used (default UTF-8). This character set is used only if not explicitly given by the XML declaration.
{document, Flag}
Set to true if Xmerl should return a complete XML document as an xmlDocument record (default false).
{comments, Flag}
Set to false if Xmerl should skip comments otherwise they will be returned as xmlComment records (default true).
{default_attrs, Flag}
Set to true if Xmerl should add to elements missing attributes with a defined default value (default false).
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xmlElement()

View Source (not exported)
-type xmlElement() ::
          #xmlElement{name :: term(),
                      expanded_name :: term(),
                      nsinfo :: term(),
                      namespace :: term(),
                      parents :: term(),
                      pos :: term(),
                      attributes :: term(),
                      content :: term(),
                      language :: term(),
                      xmlbase :: term(),
                      elementdef :: term()}.

Record #xmlElement{}

Functions

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file_sax(Fname, CallBackModule, UserState, Options)

View Source
-spec file_sax(Fname, CallBackModule, UserState, Options) -> NewUserState
                  when
                      Fname :: string(),
                      CallBackModule :: module(),
                      UserState :: term(),
                      Options :: option_list(),
                      NewUserState :: term().

Parse file containing an XML document, SAX style.

Wrapper for a call to the XML parser xmerl_scan with a hook_fun for using Xmerl export functionality directly after an entity is parsed.

-spec stream(Fname, Options) -> {xmlElement(), list()} | {error, Reason}
                when Fname :: string(), Options :: option_list(), Reason :: term().

Parse file containing an XML document as a stream, DOM style.

Wrapper for a call to the XML parser xmerl_scan with a continuation_fun for handling streams of XML data. Note that the continuation_fun, acc_fun, fetch_fun, rules and close_fun options cannot be user defined using this parser.

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stream_sax(Fname, CallBackModule, UserState, Options)

View Source
-spec stream_sax(Fname, CallBackModule, UserState, Options) ->
                    {xmerl_scan:document(), Rest} | {error, Reason}
                    when
                        Fname :: string(),
                        CallBackModule :: module(),
                        UserState :: term(),
                        Options :: option_list(),
                        Rest :: string(),
                        Reason :: term().

Parse file containing an XML document as a stream, SAX style.

Wrapper for a call to the XML parser xmerl_scan with a continuation_fun for handling streams of XML data. Note that the continuation_fun, acc_fun, fetch_fun, rules, hook_fun, close_fun and user_state options cannot be user defined using this parser.

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string_sax(String, CallBackModule, UserState, Options)

View Source
-spec string_sax(String, CallBackModule, UserState, Options) ->
                    {xmerl_scan:document(), Rest} | {error, Reason}
                    when
                        String :: list(),
                        CallBackModule :: module(),
                        UserState :: term(),
                        Options :: option_list(),
                        Rest :: string(),
                        Reason :: term().

Parse file containing an XML document, SAX style.

Wrapper for a call to the XML parser xmerl_scan with a hook_fun for using Xmerl export functionality directly after an entity is parsed.