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1		-= Introduction =
2		-
3		-In this section, we will go throw an XSL function to get trackings by trkID or using Keys/Values.
4		-
5		-= Parameters =
6		-
7		-GetTracking uses 5 params to help retrieve trackings in question.
8		-
9		-1. xpathExpression: read
10		-1. keys: it can handle 2 values, "trkID" or keys separated by ';' (eg: 'orderNumber;City;Phone')  if the key contains '_' at the first character, it means we look for metadata (_statusTracking, _creationDate ...)
11		-**NB:** all metadata will be explained in detail in another paragraph.
12		-1. values: the values must be ordered the same as 'keys'. if we're searching by 'trkID', 'values' should contain trkIDs separated by space ' '. eg : '121ee 123DD 55evr om432'
13		-In the other case where we use values depending on keys, they must be separated by ';' as shown below :
14		-if we take the last example in 'keys' param, 'orderNumber;City;Phone' , 'values' will be by example '1243;Paris;06070706053' .
15		-1. limit: it defines the max number of tracking to retrieve. **it's optional.**
16		-1. order: whether you want to order the list of trackings in a descending way or not by a certain key order. The default value is 'trkID' and it's optional as long as you fill the limit value.
17		-
18		-= Uses =
19		-
20		-We suppose that we have a tracking type named Product. It has 3 data (Name, Brand, and Country).
21		-
22		-if we want to get Product by key values
23		-
24		- {{code language="XML"}}<xsl:value-of select="ixf:GetTracking('Product', 'Name;Brand;_statusTracking' , 'Laptop;Dell;Delivered')"></xsl:value-of>{{/code}}
25		-
26		-Searching by trkIDs :
27		-
28		-{{code language="XML"}}
29		-<xsl:value-of select="ixf:GetTracking('Product', 'trkID' , '632061bef8aef457701a28d2 632061e5f8aef457701a28d3 63206213f8aef457701a28d4')"></xsl:value-of>
30		-{{/code}}
31		-
32		-Set the limit value to get only 4 elements  :
33		-
34		-{{code language="XML"}}
35		-<xsl:value-of select="ixf:GetTracking('Product', 'Name;Brand;_statusTracking' , 'Laptop;Dell;Delivered' , 4)"></xsl:value-of>
36		-{{/code}}
37		-
38		-Add an order by Country :
39		-
40		-{{code language="XML"}}
41		-<xsl:value-of select="ixf:GetTracking('Product', 'Name;Brand;_statusTracking' , 'Laptop;Dell;Delivered' , 4, 'Country')"></xsl:value-of>
42		-{{/code}}
43		-
44		-if you want to add an order without filling the limit, you must put 0 as a value to it :
45		-
46		-{{code language="XML"}}
47		-<xsl:value-of select="ixf:GetTracking('Product', 'Name;Brand;_statusTracking' , 'Laptop;Dell;Delivered' , 0, 'Country')"></xsl:value-of>
48		-{{/code}}
49		-
50		-