Task
The YML contains products with delivery=true, delivery=false, and no delivery. This catalog needs only items where delivery is allowed.
Short answer
Add an export condition to offer: delivery must match regular expression ^(true|1|yes)$ (matches true, 1, or yes from start to end).
How to do it in Eofferix
In the XML/YML snapshot, select the repeated
offernode.Open the node settings.

The animation shows opening settings for the repeated product node. Option without a regular expression: add an export condition on
delivery-Equalstrue.
This option works when the supplier always sends exactly trueorfalse.Regular expression option: add an export condition on
delivery-Regular expression^(true|1|yes)$(matchestrue,1, oryesfrom start to end).
Use this option when the supplier can write allowed delivery in several ways.
Before / after
Before
source data<yml_catalog date="2026-06-29 10:00">
<shop>
<offers>
<offer id="YML-26001">
<name>Hudson lamp</name>
<price>1290.00</price>
<delivery>true</delivery>
</offer>
<offer id="YML-26002">
<name>Parker chair</name>
<price>8400.00</price>
<delivery>false</delivery>
</offer>
<offer id="YML-26003">
<name>Harbor shelf</name>
<price>990.00</price>
</offer>
</offers>
</shop>
</yml_catalog>After
result<yml_catalog date="2026-06-29 10:00">
<shop>
<offers>
<offer id="YML-26001">
<name>Hudson lamp</name>
<price>1290.00</price>
<delivery>true</delivery>
</offer>
</offers>
</shop>
</yml_catalog>