Gnome XML Library Reference Manual
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# SAX

## Name

SAX --

## Synopsis

    #define     extern
    const xmlChar* getPublicId                  (void *ctx);
    const xmlChar* getSystemId                  (void *ctx);
    void        setDocumentLocator              (void *ctx,
                                                 xmlSAXLocatorPtr loc);
    int         getLineNumber                   (void *ctx);
    int         getColumnNumber                 (void *ctx);
    int         isStandalone                    (void *ctx);
    int         hasInternalSubset               (void *ctx);
    int         hasExternalSubset               (void *ctx);
    void        internalSubset                  (void *ctx,
                                                 const xmlChar *name,
                                                 const xmlChar *ExternalID,
                                                 const xmlChar *SystemID);
    xmlEntityPtr getEntity                      (void *ctx,
                                                 const xmlChar *name);
    xmlEntityPtr getParameterEntity             (void *ctx,
                                                 const xmlChar *name);
    xmlParserInputPtr resolveEntity             (void *ctx,
                                                 const xmlChar *publicId,
                                                 const xmlChar *systemId);
    void        entityDecl                      (void *ctx,
                                                 const xmlChar *name,
                                                 int type,
                                                 const xmlChar *publicId,
                                                 const xmlChar *systemId,
                                                 xmlChar *content);
    void        attributeDecl                   (void *ctx,
                                                 const xmlChar *elem,
                                                 const xmlChar *name,
                                                 int type,
                                                 int def,
                                                 const xmlChar *defaultValue,
                                                 xmlEnumerationPtr tree);
    void        elementDecl                     (void *ctx,
                                                 const xmlChar *name,
                                                 int type,
                                                 xmlElementContentPtr content);
    void        notationDecl                    (void *ctx,
                                                 const xmlChar *name,
                                                 const xmlChar *publicId,
                                                 const xmlChar *systemId);
    void        unparsedEntityDecl              (void *ctx,
                                                 const xmlChar *name,
                                                 const xmlChar *publicId,
                                                 const xmlChar *systemId,
                                                 const xmlChar *notationName);
    void        startDocument                   (void *ctx);
    void        endDocument                     (void *ctx);
    void        attribute                       (void *ctx,
                                                 const xmlChar *fullname,
                                                 const xmlChar *value);
    void        startElement                    (void *ctx,
                                                 const xmlChar *fullname,
                                                 const xmlChar **atts);
    void        endElement                      (void *ctx,
                                                 const xmlChar *name);
    void        reference                       (void *ctx,
                                                 const xmlChar *name);
    void        characters                      (void *ctx,
                                                 const xmlChar *ch,
                                                 int len);
    void        ignorableWhitespace             (void *ctx,
                                                 const xmlChar *ch,
                                                 int len);
    void        processingInstruction           (void *ctx,
                                                 const xmlChar *target,
                                                 const xmlChar *data);
    void        globalNamespace                 (void *ctx,
                                                 const xmlChar *href,
                                                 const xmlChar *prefix);
    void        setNamespace                    (void *ctx,
                                                 const xmlChar *name);
    xmlNsPtr    getNamespace                    (void *ctx);
    int         checkNamespace                  (void *ctx,
                                                 xmlChar *nameSpace);
    void        namespaceDecl                   (void *ctx,
                                                 const xmlChar *href,
                                                 const xmlChar *prefix);
    void        comment                         (void *ctx,
                                                 const xmlChar *value);
    void        cdataBlock                      (void *ctx,
                                                 const xmlChar *value,
                                                 int len);
    void        xmlDefaultSAXHandlerInit        (void);
    void        htmlDefaultSAXHandlerInit       (void);

## Description

## Details

### extern

    #define     extern

### getPublicId ()

    const xmlChar* getPublicId                  (void *ctx);

Return the public ID e.g. "-//SGMLSOURCE//DTD DEMO//EN"

`ctx` : | the user data (XML parser context)
Returns : | a xmlChar *

### getSystemId ()

    const xmlChar* getSystemId                  (void *ctx);

Return the system ID, basically URL or filename e.g. http://www.sgmlsource.com/dtds/memo.dtd

`ctx` : | the user data (XML parser context)
Returns : | a xmlChar *

### setDocumentLocator ()

    void        setDocumentLocator              (void *ctx,
                                                 xmlSAXLocatorPtr loc);

Receive the document locator at startup, actually xmlDefaultSAXLocator Everything is available on the context, so this is useless in our case.

`ctx` : | the user data (XML parser context)
`loc` : | A SAX Locator

### getLineNumber ()

    int         getLineNumber                   (void *ctx);

Return the line number of the current parsing point.

`ctx` : | the user data (XML parser context)
Returns : | an int

### getColumnNumber ()

    int         getColumnNumber                 (void *ctx);

Return the column number of the current parsing point.

`ctx` : | the user data (XML parser context)
Returns : | an int

### isStandalone ()

    int         isStandalone                    (void *ctx);

Is this document tagged standalone ?

`ctx` : | the user data (XML parser context)
Returns : | 1 if true

### hasInternalSubset ()

    int         hasInternalSubset               (void *ctx);

Does this document has an internal subset

`ctx` : | the user data (XML parser context)
Returns : | 1 if true

### hasExternalSubset ()

    int         hasExternalSubset               (void *ctx);

Does this document has an external subset

`ctx` : | the user data (XML parser context)
Returns : | 1 if true

### internalSubset ()

    void        internalSubset                  (void *ctx,
                                                 const xmlChar *name,
                                                 const xmlChar *ExternalID,
                                                 const xmlChar *SystemID);

Callback on internal subset declaration.

`ctx` : | the user data (XML parser context)
`name` : |
`ExternalID` : |
`SystemID` : |

### getEntity ()

    xmlEntityPtr getEntity                      (void *ctx,
                                                 const xmlChar *name);

Get an entity by name

`ctx` : | the user data (XML parser context)
`name` : | The entity name
Returns : | the xmlEntityPtr if found.

### getParameterEntity ()

    xmlEntityPtr getParameterEntity             (void *ctx,
                                                 const xmlChar *name);

Get a parameter entity by name

`ctx` : | the user data (XML parser context)
`name` : | The entity name
Returns : | the xmlEntityPtr if found.

### resolveEntity ()

    xmlParserInputPtr resolveEntity             (void *ctx,
                                                 const xmlChar *publicId,
                                                 const xmlChar *systemId);

The entity loader, to control the loading of external entities, the application can either: - override this resolveEntity() callback in the SAX block - or better use the xmlSetExternalEntityLoader() function to set up it's own entity resolution routine

`ctx` : | the user data (XML parser context)
`publicId` : | The public ID of the entity
`systemId` : | The system ID of the entity
Returns : | the xmlParserInputPtr if inlined or NULL for DOM behaviour.

### entityDecl ()

    void        entityDecl                      (void *ctx,
                                                 const xmlChar *name,
                                                 int type,
                                                 const xmlChar *publicId,
                                                 const xmlChar *systemId,
                                                 xmlChar *content);

An entity definition has been parsed

`ctx` : | the user data (XML parser context)
`name` : | the entity name
`type` : | the entity type
`publicId` : | The public ID of the entity
`systemId` : | The system ID of the entity
`content` : | the entity value (without processing).

### attributeDecl ()

    void        attributeDecl                   (void *ctx,
                                                 const xmlChar *elem,
                                                 const xmlChar *name,
                                                 int type,
                                                 int def,
                                                 const xmlChar *defaultValue,
                                                 xmlEnumerationPtr tree);

An attribute definition has been parsed

`ctx` : | the user data (XML parser context)
`elem` : |
`name` : | the attribute name
`type` : | the attribute type
`def` : |
`defaultValue` : |
`tree` : |

### elementDecl ()

    void        elementDecl                     (void *ctx,
                                                 const xmlChar *name,
                                                 int type,
                                                 xmlElementContentPtr content);

An element definition has been parsed

`ctx` : | the user data (XML parser context)
`name` : | the element name
`type` : | the element type
`content` : | the element value (without processing).

### notationDecl ()

    void        notationDecl                    (void *ctx,
                                                 const xmlChar *name,
                                                 const xmlChar *publicId,
                                                 const xmlChar *systemId);

What to do when a notation declaration has been parsed.

`ctx` : | the user data (XML parser context)
`name` : | The name of the notation
`publicId` : | The public ID of the entity
`systemId` : | The system ID of the entity

### unparsedEntityDecl ()

    void        unparsedEntityDecl              (void *ctx,
                                                 const xmlChar *name,
                                                 const xmlChar *publicId,
                                                 const xmlChar *systemId,
                                                 const xmlChar *notationName);

What to do when an unparsed entity declaration is parsed

`ctx` : | the user data (XML parser context)
`name` : | The name of the entity
`publicId` : | The public ID of the entity
`systemId` : | The system ID of the entity
`notationName` : | the name of the notation

### startDocument ()

    void        startDocument                   (void *ctx);

called when the document start being processed.

`ctx` : | the user data (XML parser context)

### endDocument ()

    void        endDocument                     (void *ctx);

called when the document end has been detected.

`ctx` : | the user data (XML parser context)

### attribute ()

    void        attribute                       (void *ctx,
                                                 const xmlChar *fullname,
                                                 const xmlChar *value);

Handle an attribute that has been read by the parser. The default handling is to convert the attribute into an DOM subtree and past it in a new xmlAttr element added to the element.

`ctx` : | the user data (XML parser context)
`fullname` : |
`value` : | The attribute value

### startElement ()

    void        startElement                    (void *ctx,
                                                 const xmlChar *fullname,
                                                 const xmlChar **atts);

called when an opening tag has been processed.

`ctx` : | the user data (XML parser context)
`fullname` : |
`atts` : | An array of name/value attributes pairs, NULL terminated

### endElement ()

    void        endElement                      (void *ctx,
                                                 const xmlChar *name);

called when the end of an element has been detected.

`ctx` : | the user data (XML parser context)
`name` : | The element name

### reference ()

    void        reference                       (void *ctx,
                                                 const xmlChar *name);

called when an entity reference is detected.

`ctx` : | the user data (XML parser context)
`name` : | The entity name

### characters ()

    void        characters                      (void *ctx,
                                                 const xmlChar *ch,
                                                 int len);

receiving some chars from the parser. Question: how much at a time ???

`ctx` : | the user data (XML parser context)
`ch` : | a xmlChar string
`len` : | the number of xmlChar

### ignorableWhitespace ()

    void        ignorableWhitespace             (void *ctx,
                                                 const xmlChar *ch,
                                                 int len);

receiving some ignorable whitespaces from the parser. Question: how much at a time ???

`ctx` : | the user data (XML parser context)
`ch` : | a xmlChar string
`len` : | the number of xmlChar

### processingInstruction ()

    void        processingInstruction           (void *ctx,
                                                 const xmlChar *target,
                                                 const xmlChar *data);

A processing instruction has been parsed.

`ctx` : | the user data (XML parser context)
`target` : | the target name
`data` : | the PI data's

### globalNamespace ()

    void        globalNamespace                 (void *ctx,
                                                 const xmlChar *href,
                                                 const xmlChar *prefix);

An old global namespace has been parsed.

`ctx` : | the user data (XML parser context)
`href` : | the namespace associated URN
`prefix` : | the namespace prefix

### setNamespace ()

    void        setNamespace                    (void *ctx,
                                                 const xmlChar *name);

Set the current element namespace.

`ctx` : | the user data (XML parser context)
`name` : | the namespace prefix

### getNamespace ()

    xmlNsPtr    getNamespace                    (void *ctx);

Get the current element namespace.

`ctx` : | the user data (XML parser context)
Returns : |

### checkNamespace ()

    int         checkNamespace                  (void *ctx,
                                                 xmlChar *nameSpace);

Check that the current element namespace is the same as the one read upon parsing.

`ctx` : | the user data (XML parser context)
`nameSpace` : | the namespace to check against
Returns : |

### namespaceDecl ()

    void        namespaceDecl                   (void *ctx,
                                                 const xmlChar *href,
                                                 const xmlChar *prefix);

A namespace has been parsed.

`ctx` : | the user data (XML parser context)
`href` : | the namespace associated URN
`prefix` : | the namespace prefix

### comment ()

    void        comment                         (void *ctx,
                                                 const xmlChar *value);

A comment has been parsed.

`ctx` : | the user data (XML parser context)
`value` : | the comment content

### cdataBlock ()

    void        cdataBlock                      (void *ctx,
                                                 const xmlChar *value,
                                                 int len);

called when a pcdata block has been parsed

`ctx` : | the user data (XML parser context)
`value` : | The pcdata content
`len` : | the block length

### xmlDefaultSAXHandlerInit ()

    void        xmlDefaultSAXHandlerInit        (void);

Initialize the default SAX handler

### htmlDefaultSAXHandlerInit ()

    void        htmlDefaultSAXHandlerInit       (void);

Initialize the default SAX handler

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