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XML schema - how to bind existence of one attribute to existence of another attribute


XML schema - how to bind existence of one attribute to existence of another attribute

By : sglidq
Date : January 10 2021, 01:57 PM
I wish this helpful for you The concept of dependencies (which you are calling "binding") in XML is managed through nesting. So if you want two fields to be dependent on one another, you should define them as mandatory attributes of a nested, optional element.
So if you have full control over the schema's structure, you could do something like this:
code :


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XML Schema - child elements dependent on existence of optional attribute

XML Schema - child elements dependent on existence of optional attribute


By : sb7
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Is it possible to define in XSD the following scenario: , No i think not.
XML schema-binding existence of an element with an attribute of specific value

XML schema-binding existence of an element with an attribute of specific value


By : user3758301
Date : March 29 2020, 07:55 AM
help you fix your problem It cannot be done in XML Schema, one part due to the limitations in the XPath syntax supported by selectors, and the other related to cross-field validation.
If such a rule must be captured in your XSD, I would rewrite the XML Schema so that the content of a element would include an optional sequence, made from a mandatory element, folllowed by zero or more . I would keep the xsd:unique clause for elements and ensure that the @Role's type is restricted so that it does not include the Counterparty value.
Which is the best way to check for the existence of an attribute?

Which is the best way to check for the existence of an attribute?


By : Nam Tom
Date : March 29 2020, 07:55 AM
I wish this help you There is no "best" way, because you are never just checking to see if an attribute exists; it is always a part of some larger program. There are several correct ways and one notable incorrect way.
The wrong way
code :
if 'property' in a.__dict__:
    a.property
class A(object):
    @property
    def prop(self):
        return 3

a = A()
print "'prop' in a.__dict__ =", 'prop' in a.__dict__
print "hasattr(a, 'prop') =", hasattr(a, 'prop')
print "a.prop =", a.prop
'prop' in a.__dict__ = False
hasattr(a, 'prop') = True
a.prop = 3
# Cached attribute
try:
    big_object = self.big_object
    # or getattr(self, 'big_object')
except AttributeError:
    # Creating the Big Object takes five days
    # and three hundred pounds of over-ripe melons.
    big_object = CreateBigObject()
    self.big_object = big_object
big_object.do_something()
try:
    f = open('some_file', 'r')
except IOError as ex:
    if ex.errno != errno.ENOENT:
        raise
    # it doesn't exist
else:
    # it does and it's open
try:
    i = int(s)
except ValueError:
    print "Not an integer! Please try again."
    sys.exit(1)
try:
    import readline
except ImportError:
    pass
# Cached attribute
if not hasattr(self, 'big_object'):
    big_object = CreateBigObject()
    self.big_object = CreateBigObject()
big_object.do_something()
# Seems rather fragile...
if re.match('^(:?0|-?[1-9][0-9]*)$', s):
    i = int(s)
else:
    print "Not an integer! Please try again."
    sys.exit(1)
if os.path.isfile('some_file'):
    # At this point, some other program could
    # delete some_file...
    f = open('some_file', 'r')
x = getattr(self, 'x', default_value)
x = getattr(self, 'attr', None)
if x is None:
    x = CreateDefaultValue()
    self.attr = x
sentinel = object()

x = getattr(self, 'attr', sentinel)
if x is sentinel:
    x = CreateDefaultValue()
    self.attr = x
How can I bind a boolean to the existence of a attribute in Angular 2?

How can I bind a boolean to the existence of a attribute in Angular 2?


By : goodjob
Date : March 29 2020, 07:55 AM
With these it helps For a boolean attribute to be removed the value needs to be null not false
code :
 "[attr.disabled]": "disabled ? true : null"
changing bgcolor of row based on existence of an attribute in xml. Each attribute will be a cell in this row

changing bgcolor of row based on existence of an attribute in xml. Each attribute will be a cell in this row


By : 劉翼傑
Date : March 29 2020, 07:55 AM
To fix the issue you can do You can add an xsl:if condition to check if there is an attribute whose name starts-with "new-feature" and then use xsl:attribute to create a new attribute
Try this snippet
code :
  <tr>
    <xsl:if test="@*[starts-with(name(), 'new-feature')]">
        <xsl:attribute name="bgcolor">green</xsl:attribute>
    </xsl:if>
     <xsl:for-each select="@*">
     <td><xsl:value-of select="name()"/>=<xsl:value-of select="."/></td>
     </xsl:for-each>
  </tr>
<xsl:template match="/">
  <html>
  <head>
      <style>
          .new-feature-true
          {
            background-color: green;
          }
      </style>
  </head>
  <body>
    <h2>cars</h2>
    <table border="1">
      <xsl:for-each select="cars/*">
      <tr><xsl:value-of select="name()"/></tr>
      <tr class="new-feature-{@*[starts-with(name(), 'new-feature')]}">
         <xsl:for-each select="@*">
         <td><xsl:value-of select="name()"/>=<xsl:value-of select="."/></td>
         </xsl:for-each>
      </tr>
      </xsl:for-each>
    </table>
  </body>
  </html>
</xsl:template>
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