java.lang.Object
- net.sf.saxon.s9api.streams.Steps

```
public class Steps
extends java.lang.Object
```
This non-instantiable class provides a number of useful implementations of the Step interface, used to navigate XDM trees, typically as an argument to XdmValue.select(net.sf.saxon.s9api.streams.Step<T>).

Constructor Summary

Constructors
Constructor Description

Steps()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Step<XdmNode>`	`ancestor()`	Obtain a `Step` to navigate from a node to its ancestors, in reverse document order (that is, nearest ancestor first, root node last)
`static Step<XdmNode>`	`ancestor(java.lang.String localName)`	Obtain a `Step` that navigates from a node to its ancestor elements having a specified local name, irrespective of the namespace.
`static Step<XdmNode>`	`ancestor(java.lang.String uri, java.lang.String localName)`	Return a `Step` that navigates from a node to its ancestors having a specified namespace URI and local name, in reverse document order (that is, nearest ancestor first, root node last)
`static Step<XdmNode>`	`ancestor(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a `Step` that filters the nodes found on the ancestor axis using a supplied `Predicate`.
`static Step<XdmNode>`	`ancestorOrSelf()`	Obtain a `Step` to navigate from a node to its ancestors, in reverse document order, with the node itself returned at the start of the sequence (that is, origin node first, root node last)
`static Step<XdmNode>`	`ancestorOrSelf(java.lang.String localName)`	Obtain a `Step` that navigates from a node to its ancestor elements having a specified local name, irrespective of the namespace.
`static Step<XdmNode>`	`ancestorOrSelf(java.lang.String uri, java.lang.String localName)`	Obtain a `Step` that navigates from a node to its ancestors-or-self having a specified namespace URI and local name, in reverse document order (that is, nearest ancestor first, root node last)
`static Step<XdmNode>`	`ancestorOrSelf(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a `Step` that filters the nodes found on the ancestor-or-self axis using a supplied `Predicate`.
`static Step<XdmAtomicValue>`	`atomize()`	Obtain a `Step` that atomizes an item to produce a stream of atomic values.
`static Step<XdmNode>`	`attribute()`	Obtain a `Step` to navigate from a node to its attributes
`static Step<XdmNode>`	`attribute(java.lang.String localName)`	Obtain a `Step` that navigates from a node to its attributes having a specified local name, irrespective of the namespace
`static Step<XdmNode>`	`attribute(java.lang.String uri, java.lang.String localName)`	Return a `Step` that navigates from a node to its attribute having a specified namespace URI and local name
`static Step<XdmNode>`	`attribute(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a `Step` that filters the nodes found on the attribute axis using a supplied `Predicate`.
`static Step<XdmAtomicValue>`	`castAs(ItemType type)`	A step equivalent to the XPath "cast as" operator: the supplied item is atomized if necessary, and the resulting atomic values are cast to the required type
`static Step<XdmNode>`	`child()`	Obtain a `Step` to navigate from a node to its children
`static Step<XdmNode>`	`child(java.lang.String localName)`	Obtain a `Step` that navigates from a node to the element children having a specified local name, irrespective of the namespace
`static Step<XdmNode>`	`child(java.lang.String uri, java.lang.String localName)`	Obtain a `Step` that navigates from a node to the element children having a specified namespace URI and local name
`static Step<XdmNode>`	`child(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a `Step` that filters the nodes found on the child axis using a supplied `Predicate`.
`static Step<XdmNode>`	`descendant()`	Obtain a `Step` to navigate from a node to its descendants, which are returned in document order
`static Step<XdmNode>`	`descendant(java.lang.String localName)`	Obtain a `Step` that navigates from a node to the descendant elements having a specified local name, irrespective of the namespace.
`static Step<XdmNode>`	`descendant(java.lang.String uri, java.lang.String localName)`	Obtain a `Step` that navigates from a node to the element descendants having a specified namespace URI and local name.
`static Step<XdmNode>`	`descendant(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a Step that filters the nodes found on the descendant axis using a supplied `Predicate`.
`static Step<XdmNode>`	`descendantOrSelf()`	Obtain a `Step` to navigate from a node to its descendants, which are returned in document order, preceded by the origin node itself
`static Step<XdmNode>`	`descendantOrSelf(java.lang.String localName)`	Obtain a `Step` that navigates from a node to the descendant-or-self elements having a specified local name, irrespective of the namespace.
`static Step<XdmNode>`	`descendantOrSelf(java.lang.String uri, java.lang.String localName)`	Obtain a `Step` that navigates from a node to the descendant-or-self elements having a specified namespace URI and local name.
`static Step<XdmNode>`	`descendantOrSelf(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a Step that filters the nodes found on the descendant-or-self axis using a supplied `Predicate`.
`static Step<XdmNode>`	`following()`	Obtain a `Step` to navigate from a node to its following nodes (excluding descendants), which are returned in document order
`static Step<XdmNode>`	`following(java.lang.String localName)`	Obtain a `Step` that navigates from a node to the following elements having a specified local name, irrespective of the namespace.
`static Step<XdmNode>`	`following(java.lang.String uri, java.lang.String localName)`	Obtain a `Step` that navigates from a node to the following elements having a specified namespace URI and local name.
`static Step<XdmNode>`	`following(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a Step that filters the nodes found on the following axis using a supplied `Predicate`.
`static Step<XdmNode>`	`followingSibling()`	Obtain a `Step` to navigate from a node to its following siblings, which are returned in document order
`static Step<XdmNode>`	`followingSibling(java.lang.String localName)`	Obtain a `Step` that navigates from a node to the following sibling elements having a specified local name, irrespective of the namespace.
`static Step<XdmNode>`	`followingSibling(java.lang.String uri, java.lang.String localName)`	Obtain a `Step` that navigates from a node to the following sibling elements having a specified namespace URI and local name.
`static Step<XdmNode>`	`followingSibling(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a Step that filters the nodes found on the following sibling axis using a supplied `Predicate`.
`static Step<XdmNode>`	`id(XdmNode doc)`	Obtain a Step whose effect is to interpret the supplied item as an xs:ID value and return the nodes (in a given document) that have that string as their ID.
`static Step<XdmNode>`	`namespace()`	Obtain a `Step` to navigate from a node to its namespace nodes
`static Step<XdmNode>`	`namespace(java.lang.String localName)`	Obtain a `Step` that navigates from a node to its namespaces having a specified local name.
`static Step<XdmNode>`	`namespace(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a `Step` that filters the nodes found on the namespace axis using a supplied `Predicate`.
`static <U extends XdmItem> Step<U>`	`nothing()`	Obtain a Step that always returns an empty sequence, whatever the input
`static Step<XdmNode>`	`parent()`	Obtain a `Step` to navigate from a node to its parent
`static Step<XdmNode>`	`parent(java.lang.String localName)`	Obtain a `Step` that navigates from a node to the parent element provided it has a specified local name, irrespective of the namespace
`static Step<XdmNode>`	`parent(java.lang.String uri, java.lang.String localName)`	Obtain a `Step` that navigates from a node to the parent element provided it has a specified namespace URI and local name
`static Step<XdmNode>`	`parent(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a `Step` that filters the node found on the parent axis using a supplied `Predicate`.
`static Step<? extends XdmNode>`	`path(java.lang.String... steps)`	Construct a simple path consisting solely of simple child, attribute, descendant, root, and parent steps.
`static Step<? extends XdmNode>`	`path(Step<? extends XdmNode>... steps)`	Construct a path as a composite `Step` from a sequence of steps composed together
`static Step<XdmNode>`	`preceding()`	Obtain a `Step` to navigate from a node to its preceding nodes (excluding ancestors), which are returned in reverse document order
`static Step<XdmNode>`	`preceding(java.lang.String localName)`	Obtain a `Step` that navigates from a node to the preceding elements having a specified local name.
`static Step<XdmNode>`	`preceding(java.lang.String uri, java.lang.String localName)`	Obtain a `Step` that navigates from a node to the preceding elements having a specified namespace URI and local name.
`static Step<XdmNode>`	`preceding(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a Step that filters the nodes found on the preceding axis using a supplied `Predicate`.
`static Step<XdmNode>`	`precedingSibling()`	Obtain a `Step` to navigate from a node to its preceding siblings, which are returned in reverse document order
`static Step<XdmNode>`	`precedingSibling(java.lang.String localName)`	Obtain a `Step` that navigates from a node to the preceding sibling elements having a specified local name, irrespective of the namespace.
`static Step<XdmNode>`	`precedingSibling(java.lang.String uri, java.lang.String localName)`	Obtain a `Step` that navigates from a node to the preceding sibling elements having a specified namespace URI and local name.
`static Step<XdmNode>`	`precedingSibling(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a Step that filters the nodes found on the preceding sibling axis using a supplied `Predicate`.
`static Step<XdmNode>`	`root()`	Obtain a `Step` that selects the root node of the containing document (which may or may not be a document node)
`static Step<XdmNode>`	`self()`	Obtain a `Step` to navigate from a node to itself (useful only if applying a predicate)
`static Step<XdmNode>`	`self(java.lang.String localName)`	Obtain a `Step` that navigates from a node to itself provided it is an element with a specified local name, irrespective of the namespace
`static Step<XdmNode>`	`self(java.lang.String uri, java.lang.String localName)`	Obtain a `Step` that navigates from a node to itself provided it has a specified namespace URI and local name
`static Step<XdmNode>`	`self(java.util.function.Predicate<? super XdmNode> filter)`	Obtain a `Step` that filters the node found on the self axis using a supplied `Predicate`.
`static Step<XdmNode>`	`text()`	Obtain a `Step` that returns text nodes found on the child axis.
`static Step<XdmAtomicValue>`	`tokenize()`	Obtain a Step whose effect is to tokenize the supplied item on whitespace boundaries, returning a sequence of strings as `XdmAtomicValue` instances.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Steps
```
public Steps()
```
- Method Detail
  - root
```
public static Step<XdmNode> root()
```
    Obtain a Step that selects the root node of the containing document (which may or may not be a document node)
  - atomize
```
public static Step<XdmAtomicValue> atomize()
```
    Obtain a Step that atomizes an item to produce a stream of atomic values. (Atomizing a node will usually produce a single atomic value, but in the case of schema-typed nodes using a list type, there may be more than one atomic value. Atomizing an array also returns multiple atomic values)
  - castAs
```
public static Step<XdmAtomicValue> castAs(ItemType type)
```
    A step equivalent to the XPath "cast as" operator: the supplied item is atomized if necessary, and the resulting atomic values are cast to the required type
  - nothing
```
public static <U extends XdmItem> Step<U> nothing()
```
    Obtain a Step that always returns an empty sequence, whatever the input
    
    Returns:
    
    a Step that always returns an empty sequence
  - ancestor
```
public static Step<XdmNode> ancestor()
```
    Obtain a Step to navigate from a node to its ancestors, in reverse document order (that is, nearest ancestor first, root node last)
    
    Returns:
    
    a Step that selects all nodes on the ancestor axis
  - ancestor
```
public static Step<XdmNode> ancestor(java.lang.String localName)
```
    Obtain a Step that navigates from a node to its ancestor elements having a specified local name, irrespective of the namespace. The nodes are returned in reverse document order (that is, nearest ancestor first, root node last)
    
    Parameters:
    
    localName - the local name of the ancestors to be selected by the Step, or "*" to select all ancestors that are element nodes
    
    Returns:
    
    a Step, which selects the ancestors of a supplied node that have the required local name.
  - ancestor
```
public static Step<XdmNode> ancestor(java.lang.String uri,
                                     java.lang.String localName)
```
    Return a Step that navigates from a node to its ancestors having a specified namespace URI and local name, in reverse document order (that is, nearest ancestor first, root node last)
    
    Parameters:
    
    uri - the namespace URI of the ancestors to be selected by the Step
    
    localName - the local name of the ancestors to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    Returns:
    
    a Step, which selects the ancestors (at most one) of a supplied node that have the required local name and namespace URI.
  - ancestor
```
public static Step<XdmNode> ancestor(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the ancestor axis using a supplied Predicate. Nodes are returned in reverse document order (that is, nearest ancestor first, root node last)
    The function call ancestor(predicate) is equivalent to ANCESTOR.where(predicate).
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the ancestor axis using a supplied Predicate.
  - ancestorOrSelf
```
public static Step<XdmNode> ancestorOrSelf()
```
    Obtain a Step to navigate from a node to its ancestors, in reverse document order, with the node itself returned at the start of the sequence (that is, origin node first, root node last)
    
    Returns:
    
    a Step that selects all nodes on the ancestor-or-self axis
  - ancestorOrSelf
```
public static Step<XdmNode> ancestorOrSelf(java.lang.String localName)
```
    Obtain a Step that navigates from a node to its ancestor elements having a specified local name, irrespective of the namespace. The nodes are returned in reverse document order (that is, nearest ancestor first, root node last), and include the node itself
    
    Parameters:
    
    localName - the local name of the ancestors to be selected by the Step, or "*" to select all ancestor-or-self nodes that are element nodes
    
    Returns:
    
    a Step, which selects the ancestors-or-self of a supplied node that have the required local name.
  - ancestorOrSelf
```
public static Step<XdmNode> ancestorOrSelf(java.lang.String uri,
                                           java.lang.String localName)
```
    Obtain a Step that navigates from a node to its ancestors-or-self having a specified namespace URI and local name, in reverse document order (that is, nearest ancestor first, root node last)
    
    Parameters:
    
    uri - the namespace URI of the ancestors to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the ancestors to be selected by the Step
    
    Returns:
    
    a Step, which selects the ancestors-or-self of a supplied node that have the required local name and namespace URI.
  - ancestorOrSelf
```
public static Step<XdmNode> ancestorOrSelf(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the ancestor-or-self axis using a supplied Predicate. Nodes are returned in reverse document order (that is, origin node first, root node last)
    The function call ancestorOrSelf(predicate) is equivalent to ANCESTOR_OR_SELF.where(predicate).
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the ancestor-or-self axis using a supplied Predicate.
  - attribute
```
public static Step<XdmNode> attribute()
```
    Obtain a Step to navigate from a node to its attributes
    
    Returns:
    
    a Step that selects all nodes on the ancestor axis
  - attribute
```
public static Step<XdmNode> attribute(java.lang.String localName)
```
    Obtain a Step that navigates from a node to its attributes having a specified local name, irrespective of the namespace
    
    Parameters:
    
    localName - the local name of the attributes to be selected by the Step, or "*" to select all attributes
    
    Returns:
    
    a Step, which selects the attributes of a supplied node that have the required local name.
  - attribute
```
public static Step<XdmNode> attribute(java.lang.String uri,
                                      java.lang.String localName)
```
    Return a Step that navigates from a node to its attribute having a specified namespace URI and local name
    
    Parameters:
    
    uri - the namespace URI of the attributes to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the attributes to be selected by the Step
    
    Returns:
    
    a Step, which selects the attributes (at most one) of a supplied node that have the required local name and namespace URI.
  - attribute
```
public static Step<XdmNode> attribute(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the attribute axis using a supplied Predicate. The function call attribute(predicate) is equivalent to ATTRIBUTE.where(predicate).
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the attribute axis using a supplied Predicate.
  - child
```
public static Step<XdmNode> child()
```
    Obtain a Step to navigate from a node to its children
    
    Returns:
    
    a Step that selects all nodes on the child axis
  - child
```
public static Step<XdmNode> child(java.lang.String localName)
```
    Obtain a Step that navigates from a node to the element children having a specified local name, irrespective of the namespace
    
    Parameters:
    
    localName - the local name of the child elements to be selected by the Step, or "*" to select all children that are element nodes
    
    Returns:
    
    a Step, which selects the element children of a supplied node that have the required local name.
  - child
```
public static Step<XdmNode> child(java.lang.String uri,
                                  java.lang.String localName)
```
    Obtain a Step that navigates from a node to the element children having a specified namespace URI and local name
    
    Parameters:
    
    uri - the namespace URI of the child elements to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the child elements to be selected by the Step
    
    Returns:
    
    a Step, which selects the element children of a supplied node that have the required local name and namespace URI.
  - child
```
public static Step<XdmNode> child(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the child axis using a supplied Predicate. The function call child(predicate) is equivalent to CHILD.where(predicate). For example, child(isElement()) returns a Step that selects the element node children of a given node.
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the child axis using a supplied Predicate.
  - descendant
```
public static Step<XdmNode> descendant()
```
    Obtain a Step to navigate from a node to its descendants, which are returned in document order
    
    Returns:
    
    a Step that selects all nodes on the descendant axis
  - descendant
```
public static Step<XdmNode> descendant(java.lang.String localName)
```
    Obtain a Step that navigates from a node to the descendant elements having a specified local name, irrespective of the namespace. These are returned in document order.
    
    Parameters:
    
    localName - the local name of the descendant elements to be selected by the Step, or "*" to select all descendants that are element nodes
    
    Returns:
    
    a Step, which selects the element descendants of a supplied node that have the required local name.
  - descendant
```
public static Step<XdmNode> descendant(java.lang.String uri,
                                       java.lang.String localName)
```
    Obtain a Step that navigates from a node to the element descendants having a specified namespace URI and local name. These are returned in document order.
    
    Parameters:
    
    uri - the namespace URI of the descendant elements to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the descendant elements to be selected by the Step
    
    Returns:
    
    a Step, which selects the element descendants of a supplied node that have the required local name and namespace URI.
  - descendantOrSelf
```
public static Step<XdmNode> descendantOrSelf()
```
    Obtain a Step to navigate from a node to its descendants, which are returned in document order, preceded by the origin node itself
    
    Returns:
    
    a Step that selects all nodes on the descendant-or-self axis
  - descendant
```
public static Step<XdmNode> descendant(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the descendant axis using a supplied Predicate. The function call descendant(predicate) is equivalent to DESCENDANT.where(predicate). For example, descendant(isElement()) returns a Step that selects the element node descendants of a given node, while descendant(exists(attribute("id"))) selects those that have an attribute named "id". These are returned in document order.
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the descendant axis using a supplied Predicate.
  - descendantOrSelf
```
public static Step<XdmNode> descendantOrSelf(java.lang.String localName)
```
    Obtain a Step that navigates from a node to the descendant-or-self elements having a specified local name, irrespective of the namespace. These are returned in document order, preceded by the origin node itself if it matches the conditions.
    
    Parameters:
    
    localName - the local name of the descendant-or-self elements to be selected by the Step, or "*" to select all descendant-or-self nodes that are element nodes
    
    Returns:
    
    a Step, which selects the element children of a supplied node that have the required local name.
  - descendantOrSelf
```
public static Step<XdmNode> descendantOrSelf(java.lang.String uri,
                                             java.lang.String localName)
```
    Obtain a Step that navigates from a node to the descendant-or-self elements having a specified namespace URI and local name. These are returned in document order, preceded by the origin node itself if it matches the conditions.
    
    Parameters:
    
    uri - the namespace URI of the descendant-or-self elements to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the descendant-or-self elements to be selected by the Step
    
    Returns:
    
    a Step, which selects the element descendants-or-self of a supplied node that have a given local name and namespace URI.
  - descendantOrSelf
```
public static Step<XdmNode> descendantOrSelf(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the descendant-or-self axis using a supplied Predicate. The function call descendant(predicate) is equivalent to DESCENDANT.where(predicate). For example, descendant(isElement()) returns a Step that selects the element node descendants of a given node, while descendant(exists(attribute("id"))) selects those that have an attribute named "id". These are returned in document order.
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the descendant-or-self axis using a supplied Predicate.
  - following
```
public static Step<XdmNode> following()
```
    Obtain a Step to navigate from a node to its following nodes (excluding descendants), which are returned in document order
    
    Returns:
    
    a Step that selects all nodes on the following axis
  - following
```
public static Step<XdmNode> following(java.lang.String localName)
```
    Obtain a Step that navigates from a node to the following elements having a specified local name, irrespective of the namespace. These are returned in document order.
    
    Parameters:
    
    localName - the local name of the following elements to be selected by the Step, or "*" to select all following nodes that are elements
    
    Returns:
    
    a Step, which selects the following elements of a supplied node that have the required local name.
  - following
```
public static Step<XdmNode> following(java.lang.String uri,
                                      java.lang.String localName)
```
    Obtain a Step that navigates from a node to the following elements having a specified namespace URI and local name. These are returned in document order.
    
    Parameters:
    
    uri - the namespace URI of the following elements to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the following elements to be selected by the Step
    
    Returns:
    
    a Step, which selects the following elements of a supplied node that have the required local name and namespace URI.
  - following
```
public static Step<XdmNode> following(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the following axis using a supplied Predicate. The function call followingSibling(predicate) is equivalent to FOLLOWING_SIBLING.where(predicate). For example, followingSibling(isElement()) returns a Step that selects the following sibling elements of a given node, while followingSibling(exists(attribute("id"))) selects those that have an attribute named "id". These are returned in document order.
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the following axis using a supplied Predicate.
  - followingSibling
```
public static Step<XdmNode> followingSibling()
```
    Obtain a Step to navigate from a node to its following siblings, which are returned in document order
    
    Returns:
    
    a Step that selects all nodes on the following-sibling axis
  - followingSibling
```
public static Step<XdmNode> followingSibling(java.lang.String localName)
```
    Obtain a Step that navigates from a node to the following sibling elements having a specified local name, irrespective of the namespace. These are returned in document order.
    
    Parameters:
    
    localName - the local name of the following sibling elements to be selected by the Step, or "*" to select all following siblings that are element nodes
    
    Returns:
    
    a Step, which selects the following sibling elements of a supplied node that have the required local name.
  - followingSibling
```
public static Step<XdmNode> followingSibling(java.lang.String uri,
                                             java.lang.String localName)
```
    Obtain a Step that navigates from a node to the following sibling elements having a specified namespace URI and local name. These are returned in document order.
    
    Parameters:
    
    uri - the namespace URI of the following sibling elements to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the following sibling elements to be selected by the Step
    
    Returns:
    
    a Step, which selects the following sibling elements of a supplied node that have the required local name and namespace URI.
  - followingSibling
```
public static Step<XdmNode> followingSibling(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the following sibling axis using a supplied Predicate. The function call followingSibling(predicate) is equivalent to FOLLOWING_SIBLING.where(predicate). For example, followingSibling(isElement()) returns a Step that selects the following sibling elements of a given node, while followingSibling(exists(attribute("id"))) selects those that have an attribute named "id". These are returned in document order.
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the following sibling axis using a supplied Predicate.
  - namespace
```
public static Step<XdmNode> namespace()
```
    Obtain a Step to navigate from a node to its namespace nodes
    
    Returns:
    
    a Step that selects all nodes on the namespace axis
  - namespace
```
public static Step<XdmNode> namespace(java.lang.String localName)
```
    Obtain a Step that navigates from a node to its namespaces having a specified local name. The local name of a namespace node corresponds to the prefix used in the namespace binding.
    
    Parameters:
    
    localName - the local name (representing the namespace prefix) of the namespace nodes to be selected by the Step, or "*" to select all namespaces
    
    Returns:
    
    a Step, which selects the namespaces of a supplied node that have a given local name (prefix).
  - namespace
```
public static Step<XdmNode> namespace(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the namespace axis using a supplied Predicate. The function call namespace(predicate) is equivalent to namespace().where(predicate). For example, namespace(eq("http://www.w3.org/1999/XSL/Transform") selects a namespace node that binds a prefix to the XSLT namespace.
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the namespace axis using a supplied Predicate.
  - parent
```
public static Step<XdmNode> parent()
```
    Obtain a Step to navigate from a node to its parent
    
    Returns:
    
    a Step that selects all nodes on the parent axis (of which there is at most one)
  - parent
```
public static Step<XdmNode> parent(java.lang.String localName)
```
    Obtain a Step that navigates from a node to the parent element provided it has a specified local name, irrespective of the namespace
    
    Parameters:
    
    localName - the local name of the parent element to be selected by the Step, or "*" to select the parent node provided it is an element
    
    Returns:
    
    a Step, which selects the parent of a supplied node provided it is an element with the required local name.
  - parent
```
public static Step<XdmNode> parent(java.lang.String uri,
                                   java.lang.String localName)
```
    Obtain a Step that navigates from a node to the parent element provided it has a specified namespace URI and local name
    
    Parameters:
    
    uri - the namespace URI of the parent element to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the parent element to be selected by the Step
    
    Returns:
    
    a Step, which selects the parent element of a supplied node provided it is an element with the required local name and namespace URI.
  - parent
```
public static Step<XdmNode> parent(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the node found on the parent axis using a supplied Predicate. The function call parent(predicate) is equivalent to parent().where(predicate). For example, parent(isElement()) returns a Step that selects the parent node provided it is an element
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the parent axis using a supplied Predicate.
  - precedingSibling
```
public static Step<XdmNode> precedingSibling()
```
    Obtain a Step to navigate from a node to its preceding siblings, which are returned in reverse document order
    
    Returns:
    
    a Step that selects all nodes on the preceding-sibling axis
  - precedingSibling
```
public static Step<XdmNode> precedingSibling(java.lang.String localName)
```
    Obtain a Step that navigates from a node to the preceding sibling elements having a specified local name, irrespective of the namespace. These are returned in reverse document order.
    
    Parameters:
    
    localName - the local name of the preceding sibling elements to be selected by the Step, or "*" to select all descendants that are element nodes
    
    Returns:
    
    a Step, which selects the preceding sibling elements of a supplied node that have the required local name.
  - precedingSibling
```
public static Step<XdmNode> precedingSibling(java.lang.String uri,
                                             java.lang.String localName)
```
    Obtain a Step that navigates from a node to the preceding sibling elements having a specified namespace URI and local name. These are returned in reverse document order.
    
    Parameters:
    
    uri - the namespace URI of the preceding sibling elements to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the preceding sibling elements to be selected by the Step
    
    Returns:
    
    a Step, which selects the preceding sibling elements of a supplied node that have the required local name and namespace URI.
  - precedingSibling
```
public static Step<XdmNode> precedingSibling(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the preceding sibling axis using a supplied Predicate. The function call precedingSibling(predicate) is equivalent to precedingSibling().where(predicate). For example, precedingSibling(isElement()) returns a Step that selects the preceding sibling elements of a given node, while precedingSibling(exists(attribute("id"))) selects those that have an attribute named "id". These are returned in reverse document order.
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the following sibling axis using a supplied Predicate.
  - preceding
```
public static Step<XdmNode> preceding()
```
    Obtain a Step to navigate from a node to its preceding nodes (excluding ancestors), which are returned in reverse document order
    
    Returns:
    
    a Step that selects all nodes on the preceding axis
  - preceding
```
public static Step<XdmNode> preceding(java.lang.String localName)
```
    Obtain a Step that navigates from a node to the preceding elements having a specified local name. These are returned in reverse document order.
    
    Parameters:
    
    localName - the local name of the preceding elements to be selected by the Step, or "*" to select all descendants that are element nodes
    
    Returns:
    
    a Step, which selects the preceding elements of a supplied node that have the required local name.
  - preceding
```
public static Step<XdmNode> preceding(java.lang.String uri,
                                      java.lang.String localName)
```
    Obtain a Step that navigates from a node to the preceding elements having a specified namespace URI and local name. These are returned in reverse document order.
    
    Parameters:
    
    uri - the namespace URI of the preceding elements to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the preceding sibling elements to be selected by the Step
    
    Returns:
    
    a Step, which selects the preceding sibling elements of a supplied node that have the required local name and namespace URI.
  - preceding
```
public static Step<XdmNode> preceding(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the nodes found on the preceding axis using a supplied Predicate. The function call preceding(predicate) is equivalent to PRECEDING.where(predicate). For example, preceding(isElement()) returns a Step that selects the preceding elements of a given node, while preceding(exists(attribute("id"))) selects those that have an attribute named "id". These are returned in reverse document order.
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the following sibling axis using a supplied Predicate.
  - self
```
public static Step<XdmNode> self()
```
    Obtain a Step to navigate from a node to itself (useful only if applying a predicate)
    
    Returns:
    
    a Step that selects all nodes on the self axis (that is, the node itself)
  - self
```
public static Step<XdmNode> self(java.lang.String localName)
```
    Obtain a Step that navigates from a node to itself provided it is an element with a specified local name, irrespective of the namespace
    
    Parameters:
    
    localName - the local name of the element to be selected by the Step, or "*" to select the node provided that it is an element node
    
    Returns:
    
    a Step, which selects the supplied node provided it has a given local name.
  - self
```
public static Step<XdmNode> self(java.lang.String uri,
                                 java.lang.String localName)
```
    Obtain a Step that navigates from a node to itself provided it has a specified namespace URI and local name
    
    Parameters:
    
    uri - the namespace URI of the element to be selected by the Step: supply a zero-length string to indicate the null namespace
    
    localName - the local name of the element to be selected by the Step
    
    Returns:
    
    a Step, which selects the supplied node provided it is an element with a given local name and namespace URI.
  - self
```
public static Step<XdmNode> self(java.util.function.Predicate<? super XdmNode> filter)
```
    Obtain a Step that filters the node found on the self axis using a supplied Predicate. The function call self(predicate) is equivalent to SELF.where(predicate). For example, self(isElement()) returns a Step that selects the supplied node provided it is an element
    
    Parameters:
    
    filter - the predicate to be applied
    
    Returns:
    
    a Step that filters the nodes found on the parent axis using a supplied Predicate.
  - text
```
public static Step<XdmNode> text()
```
    Obtain a Step that returns text nodes found on the child axis. The function call text() is equivalent to child().where(isText()). For example, self(isElement()) returns a Step that selects the supplied node provided it is an element
    
    Returns:
    
    a Step that returns the text nodes found on the child axis.
  - path
```
@SafeVarargs
public static Step<? extends XdmNode> path(Step<? extends XdmNode>... steps)
```
    Construct a path as a composite Step from a sequence of steps composed together
    
    Parameters:
    
    steps - the constituent steps in the path
    
    Returns:
    
    a composite step
  - path
```
public static Step<? extends XdmNode> path(java.lang.String... steps)
```
    Construct a simple path consisting solely of simple child, attribute, descendant, root, and parent steps. For example, path("div3", "head", "@style") selects the same nodes as the XPath 2.0 expression child::*:div3/child::*:head/attribute::*:style.
    Parameters:
    
    steps - a sequence of strings. Each string must be one of the following:
    
    A plain NCName (for example "item") selects child nodes by matching local-name (the namespace is ignored)
    
    An NCName preceded by "@" (for example, "@code"), selects attribute nodes by matching local-name (again, ignoring any namespace)
    
    The string "*" selects all child elements, regardless of name
    
    The string "/" selects the root node of the tree, provided it is a document node
    
    The string ".." selects the parent node
    
    The string "//" selects all descendant-or-self nodes (note, this does not involve finding the root of the tree: it correspondings to a binary '//' operator in XPath, not to an initial '//')
    
    .
    For more complex paths, see path(Step...)
    
    Throws:
    
    java.lang.IllegalArgumentException - if any of the strings is invalid according to these rules.
  - tokenize
```
public static Step<XdmAtomicValue> tokenize()
```
    Obtain a Step whose effect is to tokenize the supplied item on whitespace boundaries, returning a sequence of strings as XdmAtomicValue instances.
    Note: the tokenize step, when applied to a string with leading and trailing whitespace, has the effect of removing this whitespace. In addition to its primary role, the function can therefore be useful for trimming the content of a single string.
    
    Usage example: child().where(some(attribute("id").then(tokenize())).eq("a123")) selects child elements that have an attribute named "id" whose value contains the token "a123".
    
    Returns:
    
    a Step whose effect is to take a supplied item and split its string value into a sequence of xs:string instances
  - id
```
public static Step<XdmNode> id(XdmNode doc)
```
    Obtain a Step whose effect is to interpret the supplied item as an xs:ID value and return the nodes (in a given document) that have that string as their ID.
    
    Parameters:
    
    doc - the root node (document node) of the document within which the ID value should be sought
    
    Returns:
    
    a Step whose effect is to take a supplied item and split its string value into a sequence of xs:string instances

Class Steps

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Steps

Method Detail

root

atomize

castAs

nothing

ancestor

ancestor

ancestor

ancestor

ancestorOrSelf

ancestorOrSelf

ancestorOrSelf

ancestorOrSelf

attribute

attribute

attribute

attribute

child

child

child

child

descendant

descendant

descendant

descendantOrSelf

descendant

descendantOrSelf

descendantOrSelf

descendantOrSelf

following

following

following

following

followingSibling

followingSibling

followingSibling

followingSibling

namespace

namespace

namespace

parent

parent

parent

parent

precedingSibling

precedingSibling

precedingSibling

precedingSibling

preceding

preceding

preceding

preceding

self

self

self

self

text

path

path

tokenize

id