Note that this only attempts to validate the core RSS elements and the attributes that requires. No attempt is made to validate any of the elements or attributes from other modules.
I am unsure whether RSS allows the use of explicitly named list items in
the rdf:Seq, or whether it allows the option of using an
rdf:Bag in the items element to indicate that
there is no ordering being imposed by the author. I have assumed that both
of these are not allowed.
There are at least two items with the same value for their
rdf:about
attribute.
This is forbidden by the RSS Spec.
The following is an attempt to render this RSS, paying attention only to those elements and attributes defined in the core RSS Spec, and ignoring all other modules and namespaces.
There is an image in the channel
for which no matching
image can be found within the root rdf:RDF
element.
The match should be done by having an image in the
rdf:RDF which has a rdf:about attribute
which matches the rdf:resource attribute of the
image in the channel.
There are more than one image elements in the root
rdf:RDF element which have an rdf:about
attribute matching the rdf:resource of the
image element in the channel.
It is impossible to know how to proceed with rendering images.
It is recommended, but not compulsory, that the
url child of an image match the
rdf:about attribute.
There is a textinput in the channel
for which no matching
textinput can be found within the root rdf:RDF
element.
The match should be done by having an textinput in the
rdf:RDF which has a rdf:about attribute
which matches the rdf:resource attribute of the
textinput in the channel.
There are more than one textinput elements in the root
rdf:RDF element which have an rdf:about
attribute matching the rdf:resource of the
textinput element in the channel.
It is impossible to know how to proceed with rendering textinputs.
It is recommended, but not compulsory, that the
link child of an image match the
rdf:about attribute.
An items
must have a child with
a local name of Seq and a Namespace URI of
http://www.w3.org/1999/02/22-rdf-syntax-ns#.
This document has an items
element with no such children.
An items element
must have one child with
a local name of Seq and a Namespace URI of
http://www.w3.org/1999/02/22-rdf-syntax-ns#.
This document has an items
with
The RSS Spec is unclear as to
whether it allows explicitly numbered RDF list items. It appears that they
do not. Use rdf:li instead.
There is more than one explictly numbered RDF list items with a local
name of
There is an item in the channel's items
for which no matching
item can be found within the root rdf:RDF
element.
The match should be done by having an item in the
rdf:RDF which has a rdf:about attribute
which matches the rdf:resource attribute of the
image in the channel.
There are more than one item elements in the root
rdf:RDF element which have an rdf:about
attribute matching the rdf:resource of the
item element in the channel's items.
There is more than one item in the channel's
Sequence with the same rdf:resource. This may not
be what you intended.
The unqualified use of the rdf:resource attribute (i.e. without a namespace prefix) on RDF elements is deprecated by the RDF Standard.
There is one in this document with no such attribute.
resource and a Namespace URI of
http://www.w3.org/1999/02/22-rdf-syntax-ns#.
There is one in this document with no such attribute.
resource and a Namespace URI of
http://www.w3.org/1999/02/22-rdf-syntax-ns# which
contains a URI.
The value of
"
There is an item element which lacks an
rdf:about attribute.
This is invalid.
The item element with an rdf:about attribute of
" is not
referenced in the channel and therefore not an item
in this RSS document.
It is recommended, but not compulsory, that the
link child of an image match the
rdf:about attribute.
RSS has the following rules for URIs:
…only the following schemes are acceptable in url and link elements: http:, https:, ftp:. mailto: is acceptable in the textinput's link element only.
There is a
RSS's
This document contains a
There is one in this document which contains
There is one in this document which contains whitespace. It will be considered equivalent to an empty element by some processors, but is not strictly empty.
The RSS1.0 document must have a document root element with
a local name of RDF and a Namespace URI of
http://www.w3.org/1999/02/22-rdf-syntax-ns#.
This document has a document root element with a local
name of
Cannot process further.
The http://purl.org/rss/1.0/.
This document has a no such element.
Cannot process further.
A http://purl.org/rss/1.0/.
This document has a
The http://purl.org/rss/1.0/.
This document has a
Cannot process further.
A http://purl.org/rss/1.0/.
This document has such a
The http://purl.org/rss/1.0/.
This document has a
Cannot process further.