Sorry, I misread the requirement. You want a new group if the value is 30+
greater than the FIRST value in the previous group, whereas I thought you were
comparing with the LAST value in the previous group.
No, I don't think this can be done with grouping: it needs full recursion (or
in XSLT 3.0, xsl:iterate).
Using xsl:iterate it would be
<xsl:iterate select="Content">
<xsl:param name="previous" as="xs:integer?" select="()"/>
<xsl:choose>
<xsl:when test="empty($previous) or xs:integer(@value) gt @previous+30">
<Content value="{@value}"/>
<xsl:next-iteration>
<xsl:with-param name="previous" select="@value"/>
</xsl:next-iteration>
</xsl:when>
<xsl:otherwise>
<Content value=""/>
</xsl:otherwise>
</xsl:choose>
</xsl:iterate>
Michael Kay
Saxonica
On 17 Nov 2017, at 17:51, Michael Kay mike(_at_)saxonica(_dot_)com
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
You want to start a new group if @value is greater than
preceding-sibling::Content/@value.
So you can use
<xsl:for-each-group select="Content" group-starting-with="*[number(@value) gt
number(../preceding-sibling::*/@value) + 30]">
...
</xsl:for-each-group>
Michael Kay
Saxonica
On 17 Nov 2017, at 17:43, rus tle
profrustyleafiii(_at_)yahoo(_dot_)co(_dot_)uk
<mailto:profrustyleafiii(_at_)yahoo(_dot_)co(_dot_)uk>
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com
<mailto:xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com>> wrote:
Hello All,
I am trying to remove attribute values in a list based on a frequency
parameter.
Is this possible in XSLT 2? I cannot see how to tackle the problem without
being able to store the last attribute value added to the result tree so
that I can compare against it for the following attribute values? I am told
that there is no way to query the result tree and so I am at a loss as to
whether XSLT can actually do what I require?
To illustrate, please see the example below.
The frequency parameter is 30. I would like to remove all values that are
"within 30" of the last value used. If the first value is 0 then I would
like to remove all the following attribute values that are less than 30 plus
the last value added to the result tree (in this case 0). The only way I can
think to do this is by somehow caching the last value that was copied to the
result tree so I can compare against it with the next value.
It was suggested to me that adjacent grouping my work? I am a recent
beginner to XSLT and would love to learn more about how it might help me
achieve the result I am looking for?
Thanks,
Rusty
Before:
<p frequency=“30">
<Content value="0"/>
<Content value=”10”/>
<Content value=”15”/>
<Content value=”18”/>
<Content value=”22”/>
<Content value=”26”/>
<Content value=”34”/>
<Content value=”37”/>
<Content value=”56”/>
<Content value=”99”/>
<Content value=”101”/>
<Content value="115"/>
<Content value="118"/>
<Content value="129"/>
</p>
After:
<p frequency="30">
<Content value="00"/>
<Content value=""/>
<Content value=""/>
<Content value=""/>
<Content value=""/>
<Content value=""/>
<Content value="34"/>
<Content value=""/>
<Content value=""/>
<Content value="99"/>
<Content value=""/>
<Content value=""/>
<Content value=""/>
<Content value="129"/>
</p>
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