Situation: I have a source HTML file, with some values which must be completed with data from another file.

Value that must be enriched is between a unique tag.

```
<Uniquetag>Mystring1</uniquetag>

```

File 2 has several columns and many rows:

```
Info1 Mystring1 OtherInfo1 MoreInfo1
Info2 Mystring2 OtherInfo2 MoreInfo2
Info3 Mystring3 OtherInfo3 MoreInfo3
....

```

Afterwards I want to have my occurrences in HTML:

```
<Uniquetag>Mystring1 - Info1</uniquetag>

```

Both file1 and file2 are dynamic and periodically changed, I run my script after each change. It can happen that file1 does not contain the Uniquetag so nothing should be looked up. It is also possible that MyString1 cannot be found in file2. Nothing should be added in that case.

Can someone point me into the right direction on this one?