iText 8.0.2 API
|
The schema registry keeps track of all namespaces and aliases used in the XMP metadata. More...
Public Member Functions |
|
String | RegisterNamespace (String namespaceURI, String suggestedPrefix) |
Register a namespace URI with a suggested prefix. More... |
|
String | GetNamespacePrefix (String namespaceURI) |
Obtain the prefix for a registered namespace URI. More... |
|
String | GetNamespaceURI (String namespacePrefix) |
Obtain the URI for a registered namespace prefix. More... |
|
IDictionary | GetNamespaces () |
IDictionary | GetPrefixes () |
void | DeleteNamespace (String namespaceURI) |
Deletes a namespace from the registry. More... |
|
XMPAliasInfo | ResolveAlias (String aliasNS, String aliasProp) |
Determines if a name is an alias, and what it is aliased to. More... |
|
XMPAliasInfo[] | FindAliases (String aliasNS) |
Collects all aliases that are contained in the provided namespace. More... |
|
XMPAliasInfo | FindAlias (String qname) |
Searches for registered aliases. More... |
|
IDictionary | GetAliases () |
The schema registry keeps track of all namespaces and aliases used in the XMP metadata.
The schema registry keeps track of all namespaces and aliases used in the XMP metadata. At initialisation time, the default namespaces and default aliases are automatically registered. Namespaces must be registered before used in namespace URI parameters or path expressions. Within the XMP Toolkit the registered namespace URIs and prefixes must be unique. Additional namespaces encountered when parsing RDF are automatically registered. The namespace URI should always end in an XML name separator such as '/' or '#'. This is because some forms of RDF shorthand catenate a namespace URI with an element name to form a new URI.
Aliases in XMP serve the same purpose as Windows file shortcuts, Macintosh file aliases, or UNIX file symbolic links. The aliases are simply multiple names for the same property. One distinction of XMP aliases is that they are ordered, there is an alias name pointing to an actual name. The primary significance of the actual name is that it is the preferred name for output, generally the most widely recognized name.
The names that can be aliased in XMP are restricted. The alias must be a top level property name, not a field within a structure or an element within an array. The actual may be a top level property name, the first element within a top level array, or the default element in an alt-text array. This does not mean the alias can only be a simple property. It is OK to alias a top level structure or array to an identical top level structure or array, or to the first item of an array of structures.
void iText.Kernel.XMP.XMPSchemaRegistry.DeleteNamespace | ( | String | namespaceURI | ) |
Deletes a namespace from the registry.
Deletes a namespace from the registry.
Does nothing if the URI is not registered, or if the namespaceURI parameter is null or the empty string.
Note: Not yet implemented.
namespaceURI | The URI for the namespace. |
Implemented in iText.Kernel.XMP.Impl.XMPSchemaRegistryImpl.
XMPAliasInfo iText.Kernel.XMP.XMPSchemaRegistry.FindAlias | ( | String | qname | ) |
Searches for registered aliases.
qname | an XML conform qname |
Implemented in iText.Kernel.XMP.Impl.XMPSchemaRegistryImpl.
XMPAliasInfo [] iText.Kernel.XMP.XMPSchemaRegistry.FindAliases | ( | String | aliasNS | ) |
Collects all aliases that are contained in the provided namespace.
Collects all aliases that are contained in the provided namespace. If nothing is found, an empty array is returned.
aliasNS | a schema namespace URI |
Implemented in iText.Kernel.XMP.Impl.XMPSchemaRegistryImpl.
IDictionary iText.Kernel.XMP.XMPSchemaRegistry.GetAliases | ( | ) |
XMPAliasInfo
-object.
Implemented in iText.Kernel.XMP.Impl.XMPSchemaRegistryImpl.
String iText.Kernel.XMP.XMPSchemaRegistry.GetNamespacePrefix | ( | String | namespaceURI | ) |
Obtain the prefix for a registered namespace URI.
Obtain the prefix for a registered namespace URI.
It is not an error if the namespace URI is not registered.
namespaceURI | The URI for the namespace. Must not be null or the empty string. |
Implemented in iText.Kernel.XMP.Impl.XMPSchemaRegistryImpl.
IDictionary iText.Kernel.XMP.XMPSchemaRegistry.GetNamespaces | ( | ) |
Implemented in iText.Kernel.XMP.Impl.XMPSchemaRegistryImpl.
String iText.Kernel.XMP.XMPSchemaRegistry.GetNamespaceURI | ( | String | namespacePrefix | ) |
Obtain the URI for a registered namespace prefix.
Obtain the URI for a registered namespace prefix.
It is not an error if the namespace prefix is not registered.
namespacePrefix | The prefix for the namespace. Must not be null or the empty string. |
Implemented in iText.Kernel.XMP.Impl.XMPSchemaRegistryImpl.
IDictionary iText.Kernel.XMP.XMPSchemaRegistry.GetPrefixes | ( | ) |
Implemented in iText.Kernel.XMP.Impl.XMPSchemaRegistryImpl.
String iText.Kernel.XMP.XMPSchemaRegistry.RegisterNamespace | ( | String | namespaceURI, |
String | suggestedPrefix | ||
) |
Register a namespace URI with a suggested prefix.
Register a namespace URI with a suggested prefix. It is not an error if the URI is already registered, no matter what the prefix is. If the URI is not registered but the suggested prefix is in use, a unique prefix is created from the suggested one. The actual registeed prefix is always returned. The function result tells if the registered prefix is the suggested one.
Note: No checking is presently done on either the URI or the prefix.
namespaceURI | The URI for the namespace. Must be a valid XML URI. |
suggestedPrefix | The suggested prefix to be used if the URI is not yet registered. Must be a valid XML name. |
Implemented in iText.Kernel.XMP.Impl.XMPSchemaRegistryImpl.
XMPAliasInfo iText.Kernel.XMP.XMPSchemaRegistry.ResolveAlias | ( | String | aliasNS, |
String | aliasProp | ||
) |
Determines if a name is an alias, and what it is aliased to.
aliasNS | The namespace URI of the alias. Must not be null or the empty string. |
aliasProp | The name of the alias. May be an arbitrary path expression path, must not be null or the empty string. |
XMPAliasInfo
for the given alias namespace and property or null
if there is no such alias.
Implemented in iText.Kernel.XMP.Impl.XMPSchemaRegistryImpl.